EP3905573A1 - Procédé de communication, appareil de communication et support de stockage - Google Patents

Procédé de communication, appareil de communication et support de stockage Download PDF

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Publication number
EP3905573A1
EP3905573A1 EP19909252.9A EP19909252A EP3905573A1 EP 3905573 A1 EP3905573 A1 EP 3905573A1 EP 19909252 A EP19909252 A EP 19909252A EP 3905573 A1 EP3905573 A1 EP 3905573A1
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EP
European Patent Office
Prior art keywords
control channel
uplink control
channel resource
dci
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19909252.9A
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German (de)
English (en)
Other versions
EP3905573A4 (fr
Inventor
Shengyu LI
Lei GUAN
Yuan Li
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of EP3905573A1 publication Critical patent/EP3905573A1/fr
Publication of EP3905573A4 publication Critical patent/EP3905573A4/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows

Definitions

  • This application relates to the wireless communications field, and in particular, to a communication method, a communications apparatus, and a storage medium.
  • a next generation (next generation, NG) mobile communications system supports an ultra-reliable low-latency communication (Ultra-reliable and low latency communication, URLLC) service.
  • the URLLC service has a high requirement for reliability. Therefore, a channel state information (channel state information, CSI) feedback technology is quite important. Channel and interference information can be quickly obtained in time by triggering an aperiodic channel state information (aperiodic channel state information, A-CSI) feedback, to assist in improving subsequent data transmission quality.
  • CSI channel state information
  • A-CSI aperiodic channel state information
  • DCI downlink control information
  • a solution of feeding back A-CSI on an uplink control channel for example, a short physical uplink control channel (short physical uplink control channel, short PUCCH)
  • DCI for scheduling downlink URLLC data is also used to trigger a terminal device to feed back the A-CSI on the uplink control channel, thereby reducing the DCI overheads.
  • the A-CSI and the ACK/NACK need to be jointly fed back.
  • the terminal device misses detecting the DCI that triggers the A-CSI, a network device and the terminal device have inconsistent understandings on uplink control information (uplink control information, UCI) that is jointly fed back, resulting in a receiving error.
  • uplink control information uplink control information, UCI
  • Embodiments of this application provide a communication method, a communications apparatus, and a storage medium, to improve correctness of receiving uplink information.
  • an embodiment of this application provides a communication method.
  • the method includes: determining uplink information; and when the uplink information is first feedback information, determining a first uplink control channel resource corresponding to the first feedback information, and sending the first feedback information on the first uplink control channel resource; or when the uplink information includes A-CSI, determining a second uplink control channel resource corresponding to the uplink information, and sending the uplink information on the second uplink control channel resource, where the first uplink control channel resource is different from the second uplink control channel resource.
  • the method may be performed by a terminal device or a communications apparatus, for example, a chip, that can be used in the terminal device.
  • the first feedback information may be feedback information indicating that downlink data transmission is correctly decoded or incorrectly decoded, for example, an ACK/a NACK.
  • the first feedback information and the A-CSI may be respectively indicated by different DCI to be sent on overlapped time domain resources.
  • the method further includes: receiving first indication information, where the first indication information is used to indicate a first group of uplink control channel resource sets, and the first group of uplink control channel resource sets includes at least one uplink control channel resource set; and receiving second indication information, where the second indication information is used to indicate a second group of uplink control channel resource sets, and the second group of uplink control channel resource sets includes at least one uplink control channel resource set, where at least one uplink control channel resource set in the first group of uplink control channel resource sets is different from at least one uplink control channel resource set in the second group of uplink control channel resource sets.
  • the first indication information and the second indication information are configured by a higher layer.
  • the determining a first uplink control channel resource corresponding to the uplink information includes: determining the first uplink control channel resource based on first resource indication information; and the determining a second uplink control channel resource corresponding to the uplink information includes: determining the second uplink control channel resource based on second resource indication information, where the first resource indication information and the second resource indication information are included in two pieces of different DCI.
  • the first resource indication information and the second resource indication information each may be an ACK/NACK resource indicator (ACK or NACK resource indicator, ARI), or may be other indication information used to indicate a channel resource.
  • ACK ACK or NACK resource indicator, ARI
  • ARI ACK/NACK resource indicator
  • the two pieces of different DCI include first DCI and second DCI; the second resource indication information is included in the first DCI, and the first DCI corresponds to the A-CSI; and the first resource indication information is included in the second DCI, the second DCI is the N th piece of DCI that is received by the terminal device in a time sequence and/or based on a number of a carrier and that corresponds to the first feedback information, the first feedback information corresponds to N pieces of DCI, and N is a positive integer.
  • the second DCI is received after the first DCI, or the second DCI and the first DCI are received at the same time.
  • different uplink control channel resources are indicated for the first feedback information and the uplink information that includes the A-CSI by different DCI, and the second DCI is the latest piece of DCI that is received by the terminal device and that corresponds to the first feedback information.
  • the method further includes: receiving third DCI after receiving the first DCI, where the third DCI is used to indicate the terminal device to send third feedback information, and a third uplink control channel resource that carries the third feedback information does not overlap the second uplink control channel resource.
  • the terminal device does not expect to receive DCI whose corresponding feedback information overlaps the A-CSI, and the terminal device may not perform an ACK feedback/a NACK feedback on data scheduled by the DCI that is not expected to be received, or may set the feedback information to a NACK.
  • the second DCI may be used as the latest piece of DCI received by the terminal device, and resource indication information, for example, an ARI, in the second DCI may be used to indicate, for the A-CSI, an uplink control channel resource different from that of the first feedback information.
  • resource indication information for example, an ARI
  • the method further includes: receiving fourth DCI, where the fourth DCI is received after DCI (for example, the first DCI) that triggers the A-CSI, and the fourth DCI is used to indicate the terminal device to jointly send feedback information corresponding to the fourth DCI and an A-CSI report corresponding to the A-CSI.
  • the terminal device is repeatedly indicated to send the A-CSI report, so that a success rate of sending the A-CSI by the terminal device can be improved, and an error that occurs when a network device receives the uplink information is further avoided.
  • the fourth DCI is received after DCI that triggers the A-CSI may mean that a monitoring occasion in which the fourth DCI is located is later than a monitoring occasion in which DCI that triggers the A-CSI is located.
  • the fourth DCI and the DCI that triggers the A-CSI are in a same monitoring occasion, and a number of a carrier on which the fourth DCI is located is greater than a number of a carrier on which the DCI that triggers the A-CSI is located.
  • an embodiment of this application provides a communication method.
  • the method includes: determining an uplink control resource used by uplink information sent by a terminal device; when the uplink information is received on a first uplink control channel resource, determining that the uplink information is first feedback information; or when the uplink information is received on a second uplink control channel resource, determining that the uplink information includes A-CSI, where the first uplink control channel resource is different from the second uplink control channel resource; and receiving the uplink information.
  • the method may be performed by a network device (for example, a base station) or a communications apparatus, for example, a chip, that can be used in the network device.
  • a network device for example, a base station
  • a communications apparatus for example, a chip
  • the method further includes: sending first indication information to the terminal device, where the first indication information is used to indicate a first group of uplink control channel resource sets, and the first group of uplink control channel resource sets includes at least one uplink control channel resource set; and sending second indication information to the terminal device, where the second indication information is used to indicate a second group of uplink control channel resource sets, and the second group of uplink control channel resource sets includes at least one uplink control channel resource set, where at least one uplink control channel resource set in the first group of uplink control channel resource sets is different from at least one uplink control channel resource set in the second group of uplink control channel resource sets.
  • the first indication information and the second indication information are configured by a higher layer.
  • the method further includes: sending first resource indication information to the terminal device, where the first resource indication information is used to determine the first uplink control channel resource; and sending second resource indication information to the terminal device, where the second resource indication information is used to determine the second uplink control channel resource, where the first resource indication information and the second resource indication information are included in two pieces of different DCI.
  • the two pieces of different DCI include first DCI and second DCI; the second resource indication information is included in the first DCI, and the first DCI corresponds to the A-CSI; and the first resource indication information is included in the second DCI, the second DCI is the N th piece of DCI that is received by the terminal device in a time sequence and/or based on a number of a carrier and that corresponds to the first feedback information, the first feedback information corresponds to N pieces of DCI, and N is a positive integer.
  • the second DCI is sent after the first DCI, or the second DCI and the first DCI are sent at the same time.
  • the method further includes: sending third DCI to the terminal device after sending the first DCI, where the third DCI is used to indicate the terminal devices to send third feedback information, and a third uplink control channel resource that carries the third feedback information does not overlap the second uplink control channel resource.
  • the method further includes: sending fourth DCI to the terminal device, where the fourth DCI is sent after DCI (for example, the first DCI) that indicates to send the A-CSI, and the fourth DCI is used to indicate the terminal device to jointly send feedback information corresponding to the fourth DCI and an A-CSI report corresponding to the A-CSI.
  • DCI for example, the first DCI
  • the uplink information includes the A-CSI and the first feedback information
  • the sending the uplink information on the second uplink control channel resource includes: sending the A-CSI and the first feedback information on the second uplink control channel resource.
  • the uplink information includes the A-CSI and second feedback information
  • the sending the uplink information on the second uplink control channel resource includes: sending the A-CSI and the second feedback information on the second uplink control channel resource.
  • the second feedback information and the A-CSI are indicated by same DCI.
  • the uplink information includes the A-CSI, the first feedback information, and second feedback information
  • the sending the uplink information on the second uplink control channel resource includes: sending the A-CSI, the first feedback information, and the second feedback information on the second uplink control channel resource.
  • the second feedback information and the A-CSI are indicated by same DCI.
  • the second uplink control channel resource is used to carry only the A-CSI.
  • the first uplink control channel resource belongs to a first uplink control channel resource set, and the first uplink control channel resource set belongs to the first group of uplink control channel resource sets; and the second uplink control channel resource belongs to a second uplink control channel resource set, and the second uplink control channel resource set belongs to the second group of uplink control channel resource sets, where the first uplink control channel resource set is different from the second uplink control channel resource set.
  • the network device directly configures different uplink control channel resource sets for the first feedback information and the uplink information that includes the A-CSI, to save communication resources.
  • the first uplink control channel resource belongs to a third uplink control channel resource set, the third uplink control channel resource set belongs to the first group of uplink control channel resource sets, and there is a first mapping relationship between the third uplink control channel resource set and an information payload of the first feedback information; and the second uplink control channel resource belongs to a fourth uplink control channel resource set, the fourth uplink control channel resource set belongs to the first group of uplink control channel resource sets or the second group of uplink control channel resource sets, and there is a second mapping relationship between the fourth uplink control channel resource set and a sum of an information payload of the A-CSI and an information payload of the feedback information sent on the second uplink control channel resource, where the first mapping relationship is different from the second mapping relationship.
  • each uplink control channel resource set corresponds to one non-overlapped information payload range
  • the uplink control channel resource set may be mapped to different uplink control channel resource sets based on different mapping relationships.
  • an information payload range corresponding to the fourth uplink control channel resource set is the smallest one of one or more information payload ranges larger than an information payload range corresponding to the third uplink control channel resource set.
  • the terminal device sends the feedback information by using the first uplink control channel resource, and sends, by using the second uplink control channel resource, the uplink information that includes the A-CSI, where the first uplink control channel resource is different from the second uplink control channel resource. Therefore, the network device can identify, by using the control channel resource used by the received uplink information, whether the uplink information includes the A-CSI, so that the uplink information can be correctly received without a plurality of times of blind detection, and receiving complexity is low.
  • an embodiment of this application provides a communication method.
  • the method includes: receiving first DCI, where the first DCI is used to schedule first downlink data and indicate a terminal device to send A-CSI on an uplink control channel; receiving second DCI, where the second DCI is used to schedule second downlink data and indicate the terminal device to send an A-CSI report corresponding to the A-CSI; determining, based on the first DCI and the second DCI, uplink information and an uplink control channel resource that carries the uplink information; and sending the uplink information on the uplink control channel resource, where the second DCI is received later than the first DCI.
  • the second DCI may be used to indicate the terminal device to jointly send the A-CSI report and feedback information that corresponds to the second DCI.
  • the method may be performed by a terminal device or a communications apparatus, for example, a chip, that can be used in the terminal device.
  • an embodiment of this application provides a communication method.
  • the method includes: sending first DCI to a terminal device, where the first DCI is used to schedule first downlink data and trigger an A-CSI feedback; and sending second DCI to the terminal device, where the second DCI is used to schedule second downlink data and indicate the terminal device to send an A-CSI report corresponding to A-CSI, and the second DCI is sent later than the first DCI.
  • the method may be performed by a network device (for example, a base station) or a communications apparatus, for example, a chip, that can be used in the network device.
  • a network device for example, a base station
  • a communications apparatus for example, a chip
  • an embodiment of this application provides a communication method.
  • the method includes: determining an uplink control channel, where the uplink control channel is used to carry first A-CSI; determining an uplink data channel, where the uplink data channel is used to carry uplink data and/or second A-CSI, and the uplink control channel overlaps the uplink data channel in time domain; and sending information carried on a channel, with a higher priority, in the uplink control channel and the uplink data channel.
  • the method may be performed by a terminal device or a communications apparatus, for example, a chip, that can be used in the terminal device.
  • the first A-CSI is triggered by DCI, for example, by DCI for scheduling downlink data.
  • the method further includes: muting a channel, with a lower priority, in the uplink control channel and the uplink data channel.
  • the method further includes: determining a priority sequence of the uplink control channel and the uplink data channel.
  • the priority sequence may be preset and fixed.
  • the priority sequence may be configured by a higher layer.
  • the priority sequence is determined based on a type of a service of information carried on a channel. For example, a priority of an emergency service is higher than that of a non-emergency service.
  • the priority sequence is determined based on a feature of a channel.
  • the feature of the channel includes, for example, whether the uplink data channel is configured or dynamic, a scheduling/triggering sequence of the uplink data channel and the uplink control channel, or a sequence of start symbols of the uplink data channel and the uplink control channel.
  • the terminal device when the uplink data channel and the uplink control channel that carries the A-CSI overlap in time domain, the terminal device sends information carried on a channel with a higher priority, and mutes a channel with a lower priority. In this way, a problem that resources used to jointly transmit the A-CSI and the data are misplaced due to miss detection of the DCI that triggers the A-CSI is avoided, so that the A-CSI or the uplink data can be correctly received.
  • an embodiment of this application provides a communication method.
  • the method includes: receiving first DCI, where the first DCI is used to indicate a terminal device to send A-CSI on an uplink control channel; receiving second DCI, where the second DCI is used to schedule the terminal device to send uplink data on an uplink data channel, the second DCI includes indication information, and the indication information is used to indicate the terminal device to send the A-CSI on the uplink data channel; and sending the uplink data and the A-CSI on the uplink data channel based on the indication information, where the second DCI is not earlier than or later than the first DCI.
  • the method may be performed by a terminal device or a communications apparatus, for example, a chip, that can be used in the terminal device.
  • an embodiment of this application provides a communication method.
  • the method includes: sending first DCI to a terminal device, where the first DCI is used to indicate the terminal device to send A-CSI on an uplink control channel; sending second DCI to the terminal device, where the second DCI is used to schedule the terminal device to send uplink data on an uplink data channel, the second DCI includes indication information, and the indication information is used to indicate the terminal device to send the A-CSI on the uplink data channel; and receiving the uplink data and the A-CSI on the uplink data channel, where the second DCI is not earlier than or later than the first DCI.
  • the method may be performed by a network device (for example, a base station) or a communications apparatus, for example, a chip, that can be used in the network device.
  • a network device for example, a base station
  • a communications apparatus for example, a chip
  • the indication information may be a preset value in a bit field in the second DCI, and the bit field may be existing or specially set.
  • the terminal device may send, in a time unit, a same A-CSI report on an uplink control channel and an uplink data channel that overlap, thereby improving a success rate of sending the A-CSI by the terminal device.
  • an embodiment of this application provides a communications apparatus.
  • the apparatus has a function of implementing behavior of the terminal device in the communication method shown in the first aspect, the third aspect, the fifth aspect, or the sixth aspect.
  • the function may be implemented by hardware, or may be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or means (means) corresponding to the function.
  • the apparatus includes a processor.
  • the processor is configured to support the apparatus in performing a corresponding function of the terminal in the foregoing communication method.
  • the apparatus may further include a memory.
  • the memory may be coupled to the processor, and the memory stores program instructions and data that are necessary for the apparatus.
  • the apparatus further includes a transceiver.
  • the transceiver is configured to support communication between the apparatus and a network element such as a relay device or an access network device.
  • the transceiver may be an independent receiver, an independent transmitter, or a transceiver having transmission and receiving functions.
  • the communications apparatus may be a terminal, or a component, for example, a chip, a chip system, or a circuit, that can be used in the terminal.
  • an embodiment of this application provides a communications apparatus.
  • the apparatus has a function of implementing behavior of the network device in the communication method shown in the second aspect, the fourth aspect, or the seventh aspect.
  • the function may be implemented by hardware, or may be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or means (means) corresponding to the function.
  • the apparatus includes a processor.
  • the processor is configured to support the apparatus in performing a corresponding function of the network device in the foregoing communication method.
  • the apparatus may further include a memory.
  • the memory may be coupled to the processor, and the memory stores program instructions and data that are necessary for the apparatus.
  • the communications apparatus may be a network device, for example, a base station, or a component, for example, a chip, a chip system, or a circuit, that can be used in the network device.
  • the apparatus further includes a transceiver.
  • the transceiver may be configured to: support communication between the network device and a terminal, and send information or instructions in the foregoing communication method to the terminal.
  • the transceiver may be an independent receiver, an independent transmitter, or a transceiver having transmission and receiving functions.
  • an embodiment of the present invention provides a communications system, including the network device and the terminal device in the foregoing aspects.
  • an embodiment of this application provides a computer-readable storage medium.
  • the computer-readable storage medium stores instructions; and when the instructions are run on a computer, the computer is enabled to perform the communication method according to any one of the foregoing aspects.
  • an embodiment of this application provides a computer program product including instructions.
  • the computer program product runs on a computer, the computer is enabled to perform the communication method according to any one of the foregoing aspects.
  • a 5G (the fifth generation, fifth generation) system such as a long term evolution (long term evolution, LTE) system, a new radio (New Radio, NR) system, and an evolved LTE (evolved LTE, eLTE) system, or another next generation (next generation, NG) communications system.
  • LTE long term evolution
  • NR new Radio
  • eLTE evolved LTE
  • NG next generation
  • FIG. 1 is a schematic diagram of a communications system 100 according to an embodiment of this application.
  • the communications system 100 includes a network device 110 and a terminal device 120.
  • the terminal device 120 communicates with the network device 110 through an electromagnetic wave.
  • a wireless communications module of the terminal device 120 may obtain information bits that need to be sent to the network device 110 over a channel.
  • the information bits are information bits generated by a processing module of the terminal device, received from another device, or stored in a storage module of the terminal device.
  • the terminal device 120 may be used as an entity that sends uplink data to transmit an uplink channel (where the uplink channel may carry the uplink data) to the network device 110.
  • the terminal device 120 may also receive downlink data directly sent by the network device 110 or forwarded by a network node such as a relay device.
  • the terminal device 120 may be a device of various types that provides a user with voice and/or data connectivity, for example, may be a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device 120 may communicate with a core network through an access network, for example, a radio access network (radio access network, RAN), and exchange a voice and/or data with the RAN.
  • a radio access network radio access network, RAN
  • the terminal device 120 may include user equipment (user equipment, UE), a wireless terminal device, a mobile terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point, AP), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a user device (user device), or the like.
  • user equipment user equipment
  • UE wireless terminal device
  • mobile terminal device a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point, AP), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a user device (user device), or the like.
  • the terminal device 120 may include a mobile phone (which is also referred to as a "cellular" phone), a computer having a mobile terminal device, a portable, pocket-sized, handheld, computer built-in, or in-vehicle mobile apparatus, a smart wearable device, or the like.
  • the terminal device 120 is a device such as a personal communications service (personal communications service, PCS) phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a smart band, or a smart watch.
  • a personal communications service personal communications service, PCS
  • PCS personal communications service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • smart band or a smart watch.
  • the terminal device 120 further includes a limited device, for example, a device with low power consumption, a device with a limited storage capability, or a device with a limited computing capability.
  • the terminal device 120 includes an information sensing device, for example, a barcode, radio frequency identification (radio frequency identification, RFID), a sensor, a global positioning system (global positioning system, GPS), or a laser scanner.
  • the terminal device 120 may alternatively be an unmanned aerial vehicle device.
  • a chip used in the foregoing device may also be referred to as a terminal device.
  • the network device 110 may be an access network device, and the access network device may be configured to connect the terminal device 110 to an access network such as a RAN.
  • the network device 110 may be a base station defined in the 3rd generation partnership project (3rd generation partnership project, 3GPP), for example, may be a base station device, namely, an evolved NodeB (evolved NodeB, eNB/eNodeB), in an LTE system; or may be an access network side device in an NR system.
  • 3rd generation partnership project 3rd generation partnership project, 3GPP
  • 3GPP 3rd generation partnership project
  • the network device 110 includes a gNB, a transmission point (transmission point, TRP), a home evolved NodeB (for example, home evolved NodeB, or home NodeB, HNB), a baseband unit (baseband unit, BBU), or an access network device including a central unit (central unit, CU) and a distributed unit (distributed unit, DU).
  • the CU may also be referred to as a control unit (control unit).
  • a CU-DU structure is used to separate a protocol layer of a base station. Functions of some protocol layer are centrally controlled by the CU, and functions of some or all of remaining protocol layer are distributed in the DU, and the CU centrally controls the DU.
  • the LTE eNB when the eNB is connected to a 5G core network (5G-Core, 5G CN), the LTE eNB may also be referred to as an eLTE eNB.
  • the eLTE eNB is an evolved LTE base station device based on the LTE eNB, and may be directly connected to the 5G CN.
  • the eLTE eNB also belongs to a base station device in NR.
  • the network device 110 may alternatively be a wireless terminal (wireless terminal, WT), for example, an access point (access point, AP), an access controller (access controller, AC), or another network device, for example, a relay device, a vehicle-mounted device, or an intelligent wearable device, that has a capability of communicating with a terminal and a core network.
  • WT wireless terminal
  • AP access point
  • access controller access controller
  • another network device for example, a relay device, a vehicle-mounted device, or an intelligent wearable device, that has a capability of communicating with a terminal and a core network.
  • a type of the network device is not limited in the embodiments of this application.
  • the communications system 100 is merely an example for description, and a communications system to which this application is applicable is not limited thereto.
  • quantities of network devices and terminal devices included in the communications system 100 are merely examples, and the communications system 100 may include more than one terminal device and more than one network device.
  • One network device may manage one or more terminal devices.
  • one or more terminal devices may access a network through a same network device.
  • the communications system 100 may further include another device, for example, may further include a wireless relay device, a wireless backhaul device, and the like, which are not shown in FIG. 1 .
  • a one-way communication link from an access network to a terminal is a downlink, data transmitted on the downlink is downlink data, and a transmission direction of the downlink data is referred to as a downlink direction;
  • a one-way communication link from the terminal to the access network is an uplink, data transmitted on the uplink is uplink data, and a transmission direction of the uplink data is referred to as an uplink direction.
  • a resource described in the embodiments of this application may also be referred to as a transmission resource.
  • the resource includes one or more of a time domain resource, a frequency domain resource, and a code channel resource, and may be used to carry data or signaling in an uplink communication process or a downlink communication process.
  • a time unit described in the embodiments of this application is a unit of a time domain resource used for wireless communication between a network device and a terminal device.
  • a segment of time domain resource may be divided into a plurality of time units.
  • the plurality of time units may be consecutive, or may be inconsecutive. In other words, there is a preset time interval between some adjacent time units.
  • a length of one time unit is not limited in this application.
  • one time unit may be one or more subframes (subframe).
  • one time unit may be one or more slots (slot).
  • one time unit may be one or more symbols (symbol).
  • the symbol is also referred to as a time domain symbol, and the time domain symbol may be an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol, or may be a single carrier frequency division multiple access (single carrier frequency division multiple access, SC-FDMA) symbol.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDMA single carrier frequency division multiple access
  • a codebook described in the embodiments of this application includes a set of ACKs/NACKs that are fed back in an uplink time unit and that correspond to downlink data. Downlink data transmission corresponding to an ACK/a NACK is directly scheduled by DCI or is sent in a preset pattern after one piece of DCI is activated. Therefore, it may be considered that the ACK/NACK is triggered by the DCI, and the DCI may further indicate/trigger the terminal device to feed back A-CSI.
  • the terminal device may simultaneously send the codebook and the A-CSI to the network device in a same uplink time unit, or may separately send the codebook and the A-CSI to the network device in different uplink time units.
  • the codebook in the embodiments of this application includes a dynamic codebook and a semi-persistent codebook. It may be understood that the codebook may further include other uplink information. This is not limited.
  • the dynamic codebook is also referred to as a type 2 (Type 2) codebook.
  • the terminal device may detect a PDCCH in each PDCCH monitoring occasion (monitoring occasion), obtain downlink control information (downlink control information, DCI), and determine, based on a time domain resource allocation (time domain resource allocation) field and a PDSCH-to-HARQ-timing field in the DCI, an ACK feedback slot/a NACK feedback slot corresponding to a PDSCH scheduled by the PDCCH.
  • DCI downlink control information
  • the terminal device first determines a slot number of the PDSCH based on a slot number of the PDCCH and a slot offset (K0), from the PDCCH to the PDSCH, that is included in the time domain resource allocation field, and then obtains, based on the PDSCH-to-HARQ-timing field, a timing offset (K1), namely, an offset from a slot of the PDSCH to a feedback slot corresponding to the PDSCH, to determine a slot in which the ACK/NACK is sent. For an uplink slot, the terminal device may feed back only an actually scheduled ACK/NACK that points to the slot.
  • the base station When scheduling data and triggering the ACK/NACK, the base station counts downlink data of a same uplink slot to which the ACK/NACK points.
  • a value corresponding to a counter may be indicated by using a downlink assignment index (downlink assignment index, DAI), and the DAI is included in the DCI. Therefore, the UE may determine, based on the DAI in the received PDCCH, whether the UE misses detecting a piece of DCI, so that a size of the codebook for feeding back the ACK/NACK is correct.
  • DAI downlink assignment index
  • the semi-persistent codebook is also referred to as a type 1 (Type 1) codebook.
  • the network device configures a K1 set (K1 set) and a time domain resource allocation table for the terminal device by using a predefinition in a protocol or by using higher layer signaling.
  • the terminal device determines a candidate time domain position of a PDSCH based on the time domain resource allocation table, and determines, based on the candidate time domain position of the PDSCH and the K1 set, a slot in which feedback information of the PDSCH may be located.
  • the terminal device determines, based on the candidate time domain position of the PDSCH and the K1 set, a downlink PDSCH occasion set associated with the uplink slot, namely, an associated downlink slot and a PDSCH occasion set in the downlink slot, and then generates the codebook based on the associated downlink PDSCH occasion set.
  • a size of a fed back semi-persistent codebook is fixed, and the codebook may include all ACKs/NACKs that may point to downlink data transmission in the slot.
  • An uplink control channel resource set in the embodiments of this application includes one or more uplink control channel resources.
  • an uplink control channel is a PUCCH.
  • the payload size of the ACK/NACK may also be represented by the quantity of bits of the UCI.
  • a group of uplink control channel resource sets in the embodiments of this application may also be referred to as an uplink control channel resource set group (resource set group).
  • One uplink control channel resource group may include one or more uplink control channel resource sets.
  • the one or more uplink control channel resource sets may be defined in an existing protocol, or may be newly defined in this application. This is not limited.
  • B corresponding to A indicates that B is associated with A.
  • B may be determined based on A.
  • determining B based on A does not mean that B is determined based on only A, and B may be determined based on A and/or other information.
  • a plurality of means two or more than two.
  • connection means various connection manners such as a direct connection or an indirect connection, for implementing communication between devices. This is not limited in the embodiments of this application.
  • transmission refers to bidirectional transmission, and includes a sending action and/or a receiving action.
  • transmission in the embodiments of this application includes data sending, data receiving, or data sending and receiving. That is, the data transmission herein includes uplink data transmission and/or downlink data transmission. Data may include a channel and/or a signal. Uplink data transmission is uplink channel transmission and/or uplink signal transmission, and downlink data transmission is downlink channel transmission and/or downlink signal transmission.
  • a service (service) in the embodiments of this application is a communications service obtained by a terminal from a network side, and includes a control plane service and/or a data plane service, for example, a voice service or a data traffic service.
  • the sending or receiving of the service includes sending or receiving of service-related data (data) or signaling (signaling).
  • a "network” and a “system” express a same concept, and a communications system is a communications network.
  • the following uses an example in which the communications system 100 is an NR system for description.
  • the terminal device 120 may perform CSI measurement and feed back a measurement result to the network device 110, so that the network device 110 can improve performance of a communication link in a manner such as adjusting transmit signal strength, thereby improving service transmission reliability.
  • An A-CSI feedback is a type of CSI feedback.
  • the A-CSI feedback may be triggered in a DCI triggering manner, an implicit triggering manner, or the like, to assist in improving subsequent data transmission quality.
  • the A-CSI feedback may be carried on an uplink data channel, for example, a PUSCH.
  • the A-CSI feedback may be carried on an uplink control channel, for example, a physical uplink control channel (physical uplink control channel, PUCCH).
  • PUCCH physical uplink control channel
  • DCI for scheduling downlink data also triggers the terminal device to feed back A-CSI on a short uplink control channel (short PUCCH, sPUCCH). This can reduce DCI overheads and implement a fast A-CSI feedback.
  • the A-CSI and the A/N may be jointly fed back.
  • the terminal device 120 may jointly encode the A-CSI and the A/N, and select, based on an ARI in the latest piece of received DCI, the PUCCH resource to carry the A-CSI and the A/N.
  • the joint feedback of the A-CSI and the A/N in this application may be a joint feedback (or referred to as joint transmission) of the A-CSI and the A/N corresponding to downlink data scheduled by the DCI that triggers the A-CSI.
  • the joint feedback may be a joint feedback of the A-CSI and the A/N corresponding to downlink data scheduled by other DCI. This is not limited.
  • FIG. 2(a) is an example in which the A-CSI and the A/N are jointly fed back in a joint feedback mode.
  • the DCI that triggers the A-CSI also schedules the downlink data
  • the terminal device 120 feeds back the A/N for the downlink data
  • the A-CSI and the A/N may be jointly fed back in a same slot and on a same PUCCH resource.
  • DCI 1 schedules the downlink data in an uplink slot 0 (slot 0), and indicates, by using a value 01 of a CSI request field in the DCI, that one piece of A-CSI is triggered to be fed back on an sPUCCH.
  • the DCI 1 indicates, by using a value 2 of a PDSCH-to-HARQ-ACK-timing field K1 in the DCI 1, that a first A/N and the A-CSI that correspond to the downlink data are jointly fed back in an uplink slot 2 (slot 2).
  • DCI 2 schedules the downlink data but does not trigger the A-CSI, and indicates, by using a value 1 of the PDSCH-to-HARQ-ACK-timing field K1 in the DCI 2, that a second A/N corresponding to the downlink data scheduled by the DCI 2 is fed back in the slot 2. Therefore, in the scenario in FIG. 2(a) , the A-CSI, the first A/N, and the second A/N are jointly fed back.
  • FIG. 2(b) is an example in which the A-CSI and the A/N are jointly fed back in a separate feedback mode.
  • the terminal device 120 separately feeds back, in different slots or on different PUCCH resources in a same slot, the A-CSI triggered by the DCI and the A/N corresponding to the downlink data.
  • the network device 110 indicates, to the terminal device 120, a slot and/or a PUCCH resource for the A-CSI feedback. As shown in FIG.
  • DCI 1 schedules the downlink data in a slot 0 and indicates, by using a value 01 of a CSI request field in the DCI 1, that one piece of A-CSI is triggered to be fed back on an sPUCCH.
  • the DCI 1 indicates, by using a value 1 of a PDSCH-to-HARQ-ACK-timing field K1 in the DCI 1, that a first A/N corresponding to the downlink data is fed back in an uplink slot 1, and indicates, by using a value 2 of a timing field Y of the A-CSI, that the A-CSI is fed back in an uplink slot 2.
  • the downlink data is scheduled by the DCI 2, and the A-CSI is not triggered.
  • the value 1 of the PDSCH-to-HARQ-ACK-timing field K1 in the DCI 2 is used to indicate that a second A/N corresponding to the downlink data scheduled by the DCI 2 is fed back in the slot 2. Therefore, in the scenario in FIG. 2(b) , the A-CSI and the first A/N are separately fed back, and the A-CSI and the second A/N are jointly fed back.
  • the foregoing joint feedback mode and separate feedback mode are distinguished based on whether the A-CSI and the A/N indicated by the DCI that triggers the A-CSI are jointly fed back.
  • the A-CSI may overlap the A/N indicated by other DCI. In this way, the joint feedback is performed.
  • overlapping in time domain may mean that time units occupied in time domain completely or partially overlap, and the time unit may be a symbol or a slot.
  • the A-CSI, the first A/N, and the second A/N may be fed back in a same slot, and occupied slots overlap. Even if the A-CSI, the first A/N, and the second A/N occupy different symbols in a same slot, this still falls within the scope of "overlapping in time domain” described in the embodiments of this application.
  • symbols occupied by the A-CSI and the second A/N overlap, and this falls within the scope of "overlapping in time domain” described in the embodiments of this application.
  • the terminal device 120 misses detecting the DCI 1, it is considered that only the A/N needs to be fed back in the slot 2, and the A-CSI does not need to be fed back. In this case, the terminal device 120 feeds back only the A/N. However, the network device 110 still receives the A/N according to a rule that the terminal device 120 simultaneously feeds back the A/N and the A-CSI, and consequently the A/N also fails to be received.
  • the embodiments of this application provides a communication method.
  • Different uplink control channel resources are allocated to feedback information such as an ACK/a NACK and uplink information that includes A-CSI, so that a network device can correctly receive the uplink information sent by a terminal device without a plurality of times of blind detection, thereby reducing receiving complexity.
  • the communication method shown in the embodiments of this application is described by using an example in which the terminal device and the network device are execution bodies. It may be understood that the communication method described in the embodiments of this application may also be executed by another communications apparatus, for example, a chip. Details are not described below again.
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of this application. The method includes the following steps.
  • S301 A terminal device determines uplink information.
  • the uplink information includes feedback information and/or A-CSI.
  • the feedback information may include feedback information corresponding to downlink data scheduled by DCI used to indicate tosend the A-CSI and/or feedback information corresponding to downlink data scheduled by other DCI.
  • the feedback information may be specifically an ACK/a NACK, the ACK may indicate that the downlink data transmission is correctly decoded, and the NACK may indicate that downlink data transmission is incorrectly decoded.
  • the terminal device is not limited to determining and sending uplink information other than the feedback information and/or the A-CSI.
  • the terminal device may further determine and send uplink information of another type such as a scheduling request (scheduling request, SR).
  • SR scheduling request
  • the DCI used to indicate to send the A-CSI may also be referred to as first DCI.
  • the first DCI may be used to indicate the terminal device to send the A-CSI on an uplink control channel, and may be further used to schedule the downlink data.
  • the feedback information corresponding to the downlink data and the A-CSI may be jointly fed back or separately fed back.
  • the A-CSI may refer to an A-CSI report (A-CSI report), and information included in the A-CSI may be specified by a report identifier (report ID) of the A-CSI.
  • the feedback information corresponding to the downlink data scheduled by the DCI may also be referred to as feedback information corresponding to the DCI for short. Details are not described below again.
  • the method further includes: The terminal device receives the first DCI, where the first DCI is used to indicate the terminal device to send the A-CSI on the uplink control channel.
  • the method further includes: The terminal device further receives one or more pieces of DCI from a network device after receiving the first DCI, where the one or more pieces of DCI are used to indicate the terminal device to jointly send the feedback information corresponding to the DCI and the A-CSI report corresponding to the A-CSI.
  • the terminal device is repeatedly indicated to send the A-CSI report, to improve a success rate of sending the A-CSI by the terminal device.
  • the uplink control channel in this embodiment of this application may be a PUCCH.
  • the uplink control channel may be an sPUCCH, or may be another control channel that may be used to carry the uplink information such as the feedback information and/or the A-CSI. This is not limited.
  • the terminal device determines a first uplink control channel resource corresponding to the first feedback information; or when the uplink information includes the A-CSI, the terminal device determines a second uplink control channel resource corresponding to the uplink information, where the first uplink control channel resource is different from the second uplink control channel resource.
  • the terminal device sends the first feedback information on the first uplink control channel resource or sends the uplink information on the second uplink control channel resource.
  • the first feedback information may be a set of feedback information corresponding to downlink data separately scheduled by one or more pieces of DCI (where in this embodiment of this application, "second DCI” and “third DCI” are used as an example for description) other than the first DCI.
  • the first feedback information may be included in a first codebook.
  • the terminal device may receive the second DCI from the network device, receive, based on the second DCI, second downlink data scheduled by the second DCI, and generate, based on a decoding result of the second downlink data, feedback information corresponding to the second downlink data.
  • the terminal device may further receive the third DCI from the network device, receive, based on the third DCI, third downlink data scheduled by the third DCI, and generate, based on a decoding result of the third downlink data, feedback information corresponding to the third downlink data.
  • the first feedback information may include the feedback information corresponding to the second downlink data and the feedback information corresponding to the third downlink data.
  • the terminal device may always attempt to receive the DCI until a time point, for example, the N th symbol before an uplink slot n (where n and N are both positive integers). After the time point, UE still keeps receiving the DCI, and the UE may start to prepare to send, in the uplink slot n, uplink information corresponding to the DCI received before the time point, for example, the first feedback information.
  • the uplink control channel resource in this embodiment of this application is a transmission resource used by an uplink control channel.
  • sending information on the uplink control channel resource may also be understood as sending information on the uplink control channel.
  • That the first uplink control channel resource is different from the second uplink control channel resource includes: Values of the two transmission resources in at least one resource dimension are not completely the same. For example, one or more of the following cases may be included: Time domain symbols occupied by the two resources in time domain are different; subcarriers or resource blocks (radio block, RB) occupied by the two resources in frequency domain are different; and code channels (for example, values of cyclic shifts of sequences or values of orthogonal masks) occupied by the two resources in code domain are different.
  • a first uplink control channel and a second uplink control channel may use different transmission resources.
  • that the terminal device sends the uplink information on the second uplink control channel resource includes: The terminal device sends the A-CSI and second feedback information on the second uplink control channel resource.
  • the second feedback information and the A-CSI are indicated by same DCI.
  • that the terminal device sends the uplink information on the second uplink control channel resource includes: The terminal device sends the A-CSI, the first feedback information, and the second feedback information on the second uplink control channel resource.
  • the second feedback information and the A-CSI are indicated by same DCI.
  • the feedback information (for example, the second feedback information and/or the first feedback information) sent on the second uplink control channel resource may be included in a second codebook, and the second codebook is different from the first codebook.
  • that the terminal device sends the uplink information on the second uplink control channel resource includes: The terminal device sends the A-CSI and the first feedback information on the second uplink control channel resource.
  • the A-CSI and the feedback information may be jointly fed back on a same uplink control channel resource, that is, the A-CSI and the feedback information is sent on the same uplink control channel resource, and types of the joint feedback may include two types shown in FIG. 2(a) and FIG. 2(b) . Details are not described.
  • the feedback information may include the feedback information corresponding to the first DCI and the feedback information corresponding to the downlink data separately scheduled by the one or more pieces of DCI (for example, the foregoing "second DCI" and "third DCI") other than the first DCI. For example, in the scenario in FIG.
  • the second feedback information is the feedback information corresponding to the downlink data scheduled by the DCI (namely, the first DCI) that triggers the A-CSI, that is, the second feedback information and the A-CSI are indicated by same DCI
  • the first feedback information is the feedback information corresponding to the downlink data scheduled by another piece of DCI (for example, the foregoing "second DCI"). Because the uplink control channel that carries the first feedback information and the second feedback information overlaps the uplink control channel that carries the A-CSI in time domain, the A-CSI, the first feedback information, and the second feedback information are jointly encoded.
  • the feedback information may include the feedback information corresponding to the downlink data separately scheduled by the one or more pieces of DCI (for example, the foregoing "second DCI” and "third DCI") other than the first DCI.
  • the feedback information may be the feedback information separately corresponding to the one or more pieces of DCI other than the first DCI, namely, the first feedback information, and the first feedback information and the A-CSI are jointly encoded.
  • the preset condition includes: A distance between an end symbol of a downlink control channel that carries the first DCI and an earlier start symbol in a start symbol of the uplink control channel that carries the A-CSI and a start symbol of the uplink control channel that carries the feedback information is larger than or equal to a first threshold; and/or a distance between an end symbol of a downlink data channel corresponding to the feedback information and the earliest start symbol in a start symbol of the uplink control channel that carries the A-CSI and a start symbol of the uplink control channel that carries the feedback information is larger than or equal to a second threshold, where the first threshold and the second threshold may be configured by a higher layer or predefined.
  • the terminal device may separately receive the first DCI, the second DCI, and the third DCI from the network device.
  • the first DCI indicates the terminal device to feed back the A-CSI and schedule first downlink data
  • the second DCI schedules second downlink data
  • the third DCI schedules third downlink data.
  • the terminal device generates a first ACK/NACK based on the first downlink data, generates a second ACK/NACK based on the second downlink data, and generates a third ACK/NACK based on the third downlink data.
  • the terminal device determines that the uplink information is the first feedback information. That is, the uplink information includes the first codebook corresponding to the second ACK/NACK and the third ACK/NACK. Then, the terminal device may send the first codebook on a first PUCCH resource.
  • the terminal device determines that the uplink information is the A-CSI, the first feedback information, and the second feedback information.
  • the uplink information includes the second codebook corresponding to the first ACK/NACK, the second ACK/NACK, and the third ACK/NACK, and the A-CSI indicated by the first DCI. Then, the terminal device may send the second codebook and the A-CSI on a second PUCCH resource.
  • the first PUCCH resource is different from the second PUCCH resource.
  • the uplink information may include only the A-CSI, and the second uplink control channel resource may be used to carry/send only the A-CSI.
  • the method further includes the following steps.
  • S304 The network device determines the uplink control channel resource used by the uplink information.
  • S305 The network device receives the uplink information.
  • the network device performs energy detection, sequence detection, or other blind detection that does not depend on demodulation/decoding on the first uplink control channel resource or the second uplink control channel resource, to determine an uplink control channel resource used by the terminal device. If the first uplink control channel resource is detected, it indicates that the uplink information does not include the A-CSI, and the network device may receive the uplink information in a manner of receiving the feedback information. If the second uplink control channel resource is detected, it indicates that the uplink information includes the A-CSI, and the network device may receive the uplink information in a manner of receiving the feedback information and the A-CSI.
  • a specific manner of receiving the uplink information may be any receiving manner. For example, the network device receives the uplink information based on a quantity of bits of UCI fed back by the terminal device. This is not limited.
  • the terminal device sends the feedback information by using the first uplink control channel resource, and sends the uplink information (for example, the A-CSI and the feedback information) that includes the A-CSI by using the second uplink control channel resource, where the first uplink control channel resource is different from the second uplink control channel resource. Therefore, the network device identifies, by using a control channel resource used by the received uplink information, whether the uplink information includes the A-CSI, so that the uplink information can be correctly received without a plurality of times of blind detection, and receiving complexity is low.
  • the uplink information for example, the A-CSI and the feedback information
  • the implementations shown in FIG. 4 to FIG. 8 each list several specific manners of determining the uplink control channel resource (for example, the second uplink control channel resource) that carries the uplink information including the A-CSI and the uplink control channel resource (for example, the first uplink control channel resource) that carries the feedback information. It may be understood that: Mutual reference may be made between the implementations provided in this application, and the content described above is not described again.
  • the network device configures two different uplink control channel resource sets for the terminal device, and the uplink control channel resource that carries the uplink information including the A-CSI and the uplink control channel resource that carries the feedback information are respectively selected from the two resource sets.
  • the method includes the following steps.
  • the terminal device receives first indication information from the network device, where the first indication information is used to indicate a first group of uplink control channel resource sets, and the first group of uplink control channel resource sets includes at least one uplink control channel resource set.
  • an "uplink control channel resource set”, a “first group of uplink control channel resource sets”, and a “second group of uplink control channel resource sets” are respectively referred to as a “resource set”, a “first group of resource sets”, and a “second group of resource sets” for short below.
  • Each resource set in the first group of resource sets corresponds to (or map) one information payload range
  • the information payload range refers to a range of a quantity of bits of information that can be carried on an uplink control channel resource in the resource set, where a payload size may be represented by a quantity of bits of UCI (N UCI ).
  • Information payload ranges corresponding to resource sets in a same group of resource set do not overlap (in other words, do not have an intersection).
  • the information payload ranges corresponding to the resource sets in the same resource set may be arranged in ascending order.
  • the quantity of bits of the UCI corresponding to the uplink information such as the feedback information and/or the A-CSI is referred to as a quantity of bits of the uplink information for short.
  • the terminal device receives second indication information from the network device, where the second indication information is used to indicate a second group of resource sets, and the second group of resource sets includes at least one resource set.
  • each resource set in the second group of resource sets corresponds to one information payload range, and information payload ranges corresponding to resource sets do not overlap and may be arranged in ascending order. Details are not described.
  • At least one resource set in the first group of resource sets is different from at least one resource set in the second group of resource sets.
  • that the resource sets are different may mean that resources in the resource sets are different or resources included in the resource sets are arranged in different sequences. For example, resources included in the two resource sets are completely or partially different, or resources included in the two resource sets are the same but are arranged in different sequences. Because the first set of resource sets and the second set of resource sets do not completely overlap (where there may be an intersection) or do not overlap (where there is no intersection), the first group of resource sets and the second group of resource sets may be considered as two groups of different resource sets.
  • the network device and the terminal device may agree on a specific group of resource sets corresponding to the feedback information in advance, and the other group of resource sets corresponds to the feedback information and the A-CSI. This is not limited.
  • S401 may be performed before S402.
  • S402 may be performed before S401.
  • S401 and S402 may be simultaneously performed. This is not limited.
  • the first indication information or the second indication information may be predefined.
  • the terminal device may directly obtain the first indication information or the second indication information locally, and does not need to receive the first indication information or the second indication information from the network device.
  • the method further includes S403: The terminal device receives third indication information, where the third indication information is used to indicate the information payload range corresponding to each resource set in the first group of resource sets.
  • the method further includes S404: The terminal device receives fourth indication information, where the fourth indication information is used to indicate the information payload range corresponding to each resource set in the second group of resource sets.
  • the third indication information and the fourth indication information may be same indication information.
  • any one of the first indication information to the fourth indication information is a higher layer parameter configured by the network device.
  • S403 may be performed before S404.
  • S404 may be performed before S403.
  • S403 and S404 may be simultaneously performed. This is not limited.
  • S405 The network device sends first DCI to the terminal device, where the first DCI is used to schedule first downlink data and trigger an A-CSI feedback.
  • the first DCI may include first timing indication information, and the first timing indication information is used to indicate that the A-CSI and feedback information that corresponds to the first downlink data are fed back in a first time unit.
  • the network device sends second DCI to the terminal device, where the second DCI is used to schedule second downlink data.
  • the second DCI may include second timing indication information, and the second timing indication information is used to indicate that feedback information corresponding to the second downlink data is fed back in the first time unit.
  • the feedback information corresponding to the first downlink data is referred to as feedback information A
  • the feedback information corresponding to the second downlink data is referred to as feedback information B.
  • the first DCI is DCI used to indicate the terminal device to feed back the A-CSI
  • the second DCI is common DCI used to schedule downlink data transmission.
  • the first DCI and the second DCI are used as an example for description, and a quantity of different types of DCI is not limited.
  • the network device may send a plurality of pieces of DCI of a same type as the second DCI to the terminal device, the DCI of the same type as the second DCI is DCI used to schedule the downlink data, and feedback information corresponding to the scheduled downlink data, and the feedback information and the A-CSI that correspond to the first DCI are sent in a same time unit (for example, the first time unit).
  • the uplink information determined by the terminal device may include a plurality of pieces of feedback information, for example, a plurality of ACKs/NACKs, and the plurality of ACKs/NACKs may be included in a same codebook.
  • the second DCI can be successfully received by the terminal, but the first DCI may not be successfully received (for example, not detected).
  • S405 may be performed before S406.
  • S406 may be performed before S405.
  • S405 and S406 may be simultaneously performed. This is not limited.
  • the terminal device may first receive the indication information indicating the resource set, and then receive the DCI. That is, S401 and S402/S401 to S404 are first performed, and then S405 and S406 are performed.
  • the terminal device determines the uplink information to be fed back to the network device.
  • the terminal device may receive the second downlink data based on the second DCI, and generate the feedback information B based on a decoding result of the second downlink data.
  • the terminal device attempts to receive the first DCI.
  • the terminal device determines that the uplink information is the feedback information B, and the feedback information B may be included in a codebook.
  • the terminal device receives the first downlink data based on the first DCI, and generates the feedback information A based on a decoding result of the first downlink data, and the terminal device determines that the uplink information includes the A-CSI.
  • the uplink information may include the A-CSI, the feedback information A, and the feedback information B.
  • the feedback information A and the feedback information B may be included in another codebook.
  • the terminal device determines an uplink control channel resource that carries the uplink information.
  • S409 The terminal device sends the uplink information to the network device on the uplink control channel resource.
  • the terminal device may determine, based on content of the uplink information, a group of resource sets and a resource set that correspond to the uplink information, and further determine an uplink resource in the resource set. For example, an uplink control channel resource B that carries the feedback information B belongs to a first resource set, and the first resource set belongs to the first group of resource sets. An uplink control channel resource A that carries the feedback information A, the feedback information B, and the uplink information of the A-CSI belongs to a second resource set, and the second resource set belongs to the second group of resource sets. The first resource set is different from the second resource set. In an example, the terminal device selects one resource set from each of the first group of resource sets and the second group of resource sets, and the two selected resource sets are different.
  • the uplink information corresponds to the first group of resource sets. Further, the terminal device determines, in the first group of resource sets based on a quantity of bits of the feedback information B, a resource set to which the quantity of bits of the feedback information B is mapped as a target resource set.
  • the terminal device determines that the uplink information includes the A-CSI, the feedback information A, and the feedback information B, the uplink information corresponds to the second group of resource sets.
  • the terminal device determines, in the second group of resource sets based on a sum of quantities of bits of the feedback information A, the feedback information B, and the A-CSI or based on a sum of quantities of bits of the feedback information A, the codebook corresponding to the feedback information B, and the A-CSI, a resource set corresponding to the sum of the quantities of bits as a target resource set.
  • the terminal device After determining the target resource set, when the terminal device latest receives the DCI based on the first DCI and the second DCI, or when the terminal device receives a plurality of pieces of DCI of a same type as the second DCI, the terminal device determines, in the target resource set based on resource indication information, for example, an ARI, in the latest received DCI, that an uplink control channel resource indicated by using the resource indication information is a resource that carries the uplink information.
  • resource indication information for example, an ARI
  • the first group of resource sets is denoted as a group 1, and the second group of resource sets is denoted as a group 2.
  • the group 1 includes three resource sets, denoted as ⁇ set 0, set 1, set 2 ⁇ .
  • An information payload range corresponding to the set 0 is [1, 2]
  • an information payload range corresponding to the set 1 is [3, 11]
  • an information payload range corresponding to the set 2 is [12, 1706].
  • the group 2 includes three resource sets, denoted as ⁇ set 3, set 4, set 5 ⁇ .
  • An information payload range corresponding to the set 3 is [1, 2]
  • an information payload range corresponding to the set 4 is [3, 11]
  • an information payload range corresponding to the set 5 is [12, 1706].
  • each of the set 0 to the set 5 includes eight uplink control channel resources. It is assumed that an arrangement sequence of uplink control channel resources in the set 0 is different from that of uplink control channel resources in the set 3, that is, the set 0 and the set 3 are different resource sets.
  • the terminal device may select a resource set from the group 1 based on the quantity of bits of the feedback information B corresponding to the second DCI. For example, assuming that the quantity of bits of the feedback information B is 4, the terminal device determines that the uplink control channel resource that carries the feedback information is selected from the set 1.
  • the terminal device may select a resource set from the group 2 based on a sum of the quantities of bits of the feedback information A and the A-CSI that correspond to the first DCI. For example, when the sum of the quantities of bits of the feedback information A and the A-CSI is 11, the terminal device determines that the uplink control channel resource that carries the feedback information is selected from the set 4.
  • information payload ranges corresponding to resource sets in each group of resource sets are arranged in ascending order.
  • the uplink information includes the ACK/NACK and the A-CSI
  • the uplink control channel is a PUCCH
  • the terminal device may determine, based on a codebook corresponding to the ACK/NACK, a quantity of bits of the ACK/NACK that needs to be fed back, determine the quantity of bits of the A-CSI, and then select, from a group of resource sets (for example, the second group of resource sets) corresponding to the ACK/NACK and the A-CSI, a PUCCH resource set corresponding to a sum of the quantities of bits of the ACK/NACK and the A-CSI.
  • a group of resource sets for example, the second group of resource sets
  • the PUCCH resource set may include at least eight PUCCH resources and at most 32 PUCCH resources. Further, the terminal device may determine, based on an ARI in the latest received DCI corresponding to the codebook corresponding to the ACK/NACK, a specific PUCCH resource, in the PUCCH resource set, that is used to feeds back the codebook.
  • the PUCCH resource set may be divided into a plurality of resource subsets (subset).
  • the ARI is used to indicate to select a specific resource subset, and a start control channel element (Control Channel Element, CCE) index of a PDCCH is used to implicitly indicate that a specific resource in the resource subset indicated by using the ARI is selected.
  • CCE Control Channel Element
  • a manner of configuring or predefining the first group of resource sets and the second group of resource sets by a higher layer is used, so that efficiency is high and impact on a process of communication between the terminal device and the network device is small.
  • a mapping relationship (a mapping relationship A) between an information payload of the uplink information and the resource set to which the uplink control channel resource that carries the uplink information including the A-CSI belongs is different from a mapping relationship (a mapping relationship B) between the resource set to which the uplink control channel that carries the feedback information belongs and an information payload of the feedback information.
  • the method includes the following steps.
  • the terminal device receives first indication information from the network device, where the first indication information is used to indicate a first group of resource sets, and the first group of resource sets includes at least one resource set.
  • Each resource set in the first group of resource sets corresponds to one information payload range, information payload ranges corresponding to resource sets do not overlap, and information payload ranges corresponding to resource sets in a same group of resource sets may be arranged in ascending order.
  • information payload ranges corresponding to resource sets in a same group of resource sets may be arranged in ascending order.
  • the terminal device receives second indication information from the network device, where the second indication information is used to indicate a resource set (referred to as a "resource set N" below for ease of description), and the resource set N is different from any resource set in the first group of resource sets.
  • the second indication information is used to indicate a resource set (referred to as a "resource set N" below for ease of description)
  • the resource set N is different from any resource set in the first group of resource sets.
  • an information payload range corresponding to the resource set N is equal to an information payload range corresponding to the last resource set in the first group of resource sets.
  • the first group of resource sets includes three resource sets, denoted as ⁇ set 0, set 1, set 2 ⁇ .
  • An information payload range corresponding to the set 0 is [1, 2]
  • an information payload range corresponding to the set 1 is [3, 11]
  • an information payload range corresponding to the set 2 is [12, 1706].
  • the information payload range corresponding to the resource set N may be [12, 1706].
  • S502 is an optional step. When both S501 and S502 are performed, the two steps are performed in any sequence.
  • the method further includes S503: The terminal device receives third indication information from the network device, where the third indication information is used to indicate the information payload range corresponding to each resource set in the first group of resource sets.
  • the network device sends first DCI to the terminal device, where the first DCI is used to schedule first downlink data and trigger an A-CSI feedback.
  • the first DCI may include first timing indication information, and the first timing indication information is used to indicate that the A-CSI and feedback information that corresponds to the first downlink data are fed back in a first time unit.
  • S505 The network device sends second DCI to the terminal device, where the second DCI is used to schedule second downlink data.
  • the second DCI may include second timing indication information, and the second timing indication information is used to indicate that feedback information corresponding to the second downlink data is fed back in the first time unit.
  • S504 may be performed before S505.
  • S505 may be performed before S504.
  • S504 and S505 may be simultaneously performed. This is not limited.
  • first DCI and the second DCI refer to the related content in the implementation shown in FIG. 4 . Details are not described.
  • the feedback information corresponding to the first downlink data is referred to as feedback information A
  • the feedback information corresponding to the second downlink data is referred to as feedback information B.
  • S506 The terminal device determines the uplink information to be fed back to the network device.
  • the terminal device determines that the uplink information is the feedback information B.
  • the terminal device determines that the uplink information includes the A-CSI, for example, includes the A-CSI, the feedback information A, and the feedback information B.
  • the uplink information includes the A-CSI, for example, includes the A-CSI, the feedback information A, and the feedback information B.
  • the terminal device determines an uplink control channel resource that carries the uplink information.
  • the terminal device sends the uplink information to the network device on the uplink control channel resource.
  • the uplink control channel resource that carries the feedback information B may be selected from a resource set in the first group of resource sets.
  • the uplink control channel resource that carries the uplink information including the feedback information A, the feedback information B, and the A-CSI may be selected from a resource set in the first group of resource sets or selected from the resource set N.
  • a mapping relationship A exists between a resource set corresponding to the uplink information including the feedback information A, the feedback information B, and the uplink information of the A-CSI and a sum of information payloads of the feedback information A, the feedback information B, and the A-CSI.
  • a mapping relationship B exists between a resource set corresponding to the feedback information B and the information payload of the feedback information B.
  • the mapping relationship A is different from the mapping relationship B.
  • the information payload may be represented by using a quantity of bits.
  • the terminal device may determine, in the first group of resource sets based on a quantity of bits of the feedback information B, a resource set to which the quantity of bits of the feedback information B is mapped as a target resource set.
  • the terminal device When the terminal device determines that the uplink information includes the A-CSI, the feedback information A, and the feedback information B, the terminal device first determines, in the first group of resource sets based on a quantity of bits of a codebook B corresponding to the feedback information B, a resource set B that matches the quantity of bits of the codebook B, and determines, in the first group of resource sets based on a sum of a quantity of bits of a codebook A corresponding to the feedback information A and the feedback information B and a quantity of bits of the A-CSI, a resource set A that matches the quantity of bits of the codebook B.
  • the resource set A and the resource set B may be the same or different.
  • the resource set B and the resource set A are different resource sets, and the terminal device may determine the resource set A as the target resource set.
  • a resource set corresponds to an information payload range. Therefore, even if the quantity of bits of the codebook B is different from the sum of the quantities of bits of the A-CSI and the codebook A, if the two correspond to a same information payload range, the resource set A and the resource set B may be a same resource set. In this case, the terminal device may adjust the resource set corresponding to the A-CSI and the codebook A.
  • the terminal device may adjust the resource set to which the sum of the quantities of bits of the A-CSI and the codebook A is mapped to a resource set corresponding to a larger payload range, and the new resource set may be referred to as a resource set C.
  • an information payload range corresponding to the resource set C is larger than the information payload range corresponding to the resource set A.
  • the terminal device may use the resource set C as the target resource set.
  • the information payload range corresponding to the resource set C is the smallest one of one or more information payload ranges larger than the information payload range corresponding to the resource set A.
  • the resource set C is a resource set with the smallest information payload range in resource sets with corresponding information payload ranges larger than that of the resource set A.
  • the first group of resource sets is ⁇ set 0, set 1, set 2, set 3 ⁇ .
  • An information payload range corresponding to the set 0 is [1, 2]
  • an information payload range corresponding to the set 1 is [3, 11]
  • an information payload range corresponding to the set 2 is [12, 100]
  • an information payload range corresponding to the set 3 is [101, 1076]. It may be understood that the information payload ranges corresponding to the set 0 to the set 3 increase in ascending order. If the terminal device determines that the uplink information is the feedback information B, and determines that the quantity of bits of the feedback information B is 3, the terminal device selects, from the set 1, the uplink control channel resource that carries the feedback information B.
  • the terminal device determines that the uplink information includes the A-CSI, the feedback information A, and the feedback information B, and determines that the sum of the quantities of bits of the A-CSI, the feedback information A, and the feedback information B is 11, the quantity 11 of bits may be mapped to the set 1 based on the preset mapping relationship. That is, the resource that carries the uplink information is originally selected from the set 1.
  • the terminal device may adjust the mapping relationship between the quantity of bits and the resource set, to map the quantity 11 of bits to a resource set with corresponding information payload range larger than the information payload range corresponding to the set 1, for example, mapped to the set 2 or the set 3. That is, the terminal device may determine the set 2 or the set 3 as the resource set C. In this way, the terminal device selects, from the set 2 or the set 3, the uplink control channel resource to carry the uplink information including the A-CSI.
  • the terminal device may determine the set 2 as the resource set C. Because the information payload range of the set 2 is the smallest one of information payload ranges larger than the information payload range of the set 1, a size of the uplink control channel resource selected from the set 2 is relatively small, so that transmission resources can be saved, impact on a process of communication between the terminal device and the network device is small, and communication quality is further improved.
  • the terminal device determines that the target resource set is a new resource set outside the first group of resource sets.
  • the target resource set is the resource set N.
  • the first group of resource sets is ⁇ set 0, set 1, set 2 ⁇ , and the resource set N is a set 3.
  • An information payload range corresponding to the set 0 is [1, 2]
  • an information payload range corresponding to the set 1 is [3, 11]
  • each of information payload ranges corresponding to the set 2 and the set 3 is [12, 1706].
  • the terminal device determines that the uplink information is the feedback information B, and determines that the quantity of bits of the feedback information B is 13, the uplink control channel resource that carries the feedback information B is selected from the set 2. If the terminal device determines that the uplink information includes the A-CSI, the feedback information A, and the feedback information B, and determines that the sum of the quantities of bits of the A-CSI, the feedback information A, and the feedback information B is 25, a resource that carries the uplink information is originally selected from the set 2. However, the terminal device may adjust the mapping relationship to map the quantity 25 of bits to the set 3, and select the uplink control channel resource from the set 3 to carry the uplink information that includes the A-CSI.
  • the terminal device may determine, in the target resource set based on resource indication information in DCI (namely, DCI latest received by the terminal device) latest received based on the first DCI and the second DCI, the uplink control channel resource indicated by using the resource indication information to carry the uplink information.
  • DCI resource indication information in DCI
  • the terminal device may determine, in the target resource set based on resource indication information in DCI (namely, DCI latest received by the terminal device) latest received based on the first DCI and the second DCI, the uplink control channel resource indicated by using the resource indication information to carry the uplink information.
  • the uplink control channel resource that carries the uplink information including the A-CSI and the uplink control channel resource that carries the feedback information are indicated by different DCI.
  • the method includes the following steps.
  • the network device sends first DCI to the terminal device, where the first DCI is used to schedule first downlink data and trigger an A-CSI feedback.
  • the first DCI includes resource indication information A, and the resource indication information A is used to indicate an uplink control channel resource A.
  • the first DCI may further include first timing indication information, and the first timing indication information is used to indicate that the A-CSI and feedback information that corresponds to the first downlink data are fed back in a first time unit.
  • the network device sends second DCI to the terminal device, where the second DCI is used to schedule second downlink data.
  • the second DCI includes resource indication information B, and the resource indication information B is used to indicate an uplink control channel resource B.
  • the second DCI may further include second timing indication information, and the second timing indication information is used to indicate that feedback information corresponding to the second downlink data is fed back in the first time unit.
  • the first DCI and the second DCI are different DCI.
  • the second DCI is sent/received after the first DCI or the second DCI and the first DCI are simultaneously sent/received.
  • the second DCI is later than/not earlier than the first DCI.
  • that the second DCI is later than/not earlier than the first DCI may mean that a second monitoring occasion in which the second DCI is located is later than/not earlier than a first monitoring occasion in which the second DCI is located.
  • that the second monitoring occasion is later than/not earlier than the first monitoring occasion means that a start symbol of the second monitoring occasion is later than/not earlier than a start symbol of the first monitoring occasion.
  • that the second DCI is later than/not earlier than the first DCI may mean that a second monitoring occasion in which the second DCI is located is later than/not earlier than a first monitoring occasion in which the second DCI is located.
  • a number of a carrier on which the second DCI is located is greater than/not less than a number of a carrier on which the first DCI is located.
  • the monitoring occasion may be, for example, a PDCCH occasion (PDCCH occasion).
  • first DCI and the second DCI refer to the related content in the implementation shown in FIG. 4 . Details are not described.
  • the feedback information corresponding to the first downlink data is referred to as feedback information A
  • the feedback information corresponding to the second downlink data is referred to as feedback information B.
  • the resource indication information A and the resource indication information B indicate two different uplink control channel resources.
  • the uplink control channel resource A is used to carry the uplink information including the A-CSI, and the uplink information may further include the feedback information A and/or the feedback information B.
  • the uplink control channel resource B is used to carry the feedback information B.
  • the first resource indication information A or the second resource indication information B is an ARI.
  • the terminal device determines the uplink information to be fed back to the network device.
  • the terminal device determines that the uplink information is the feedback information B.
  • the terminal device determines that the uplink information includes the A-CSI.
  • the terminal device determines an uplink control channel resource that carries the uplink information.
  • the terminal device sends the uplink information to the network device on the uplink control channel resource.
  • the terminal device determines the uplink control channel resource B based on the resource indication information B in the second DCI. After UE successfully receives the first DCI, the terminal device determines the uplink control channel resource A based on the resource indication information A in the first DCI.
  • the terminal device may further receive one or more pieces of DCI used to schedule downlink data.
  • the terminal device may receive third DCI used to schedule third downlink data, and the third DCI includes third timing indication information used to indicate that third feedback information is sent in the first time unit.
  • feedback information C when the first DCI is successfully received, feedback information (referred to as feedback information C below) corresponding to the third downlink data may be jointly fed back with the A-CSI scheduled by the first DCI, and is sent on the uplink control channel resource A, and the feedback information A, the feedback information B, and the feedback information C may be included in a same codebook (codebook C).
  • the feedback information C may be sent on the uplink control channel resource B, and the feedback information C and the feedback information B may be included in another codebook (codebook D).
  • the second DCI is the latest piece of DCI that is received by the terminal device and that corresponds to the feedback information (for example, the feedback information B and the feedback information C) carried on the uplink control channel resource B.
  • the second DCI is the N th piece of DCI that is received by the terminal device based on a time sequence and/or a number of a carrier and that corresponds to the feedback information carried on the uplink control channel resource B, and the feedback information carried on the uplink control channel resource B corresponds to N pieces of DCI (where N is a positive integer). That the DCI is received based on the number of the carrier may be applicable to a multi-carrier scenario.
  • the second DCI is the latest piece of DCI in the plurality of pieces of DCI, of this type, that are received by the terminal device, and feedback information corresponding to the plurality of pieces of DCI of the same type as the second DCI may be included in a same codebook.
  • the codebook D includes the feedback information B and the feedback information C, the feedback information B is indicated by the second DCI, the feedback information C is indicated by the third DCI, and the second DCI may be received after the third DCI.
  • the uplink control channel resource that carries the A-CSI is indicated by using resource indication information in DCI latest received by the terminal device, and the control channel resource indicated by using the resource indication information is different from the foregoing uplink control channel resource that is indicated by the DCI and that carries the feedback information.
  • the terminal device does not expect to receive fourth DCI.
  • the fourth DCI does not trigger the A-CSI feedback, and an uplink control channel resource used for feedback information corresponding to the fourth DCI overlaps the uplink control channel resource A in time domain.
  • the uplink control channel resource used for the feedback information corresponding to the received DCI does not overlap the uplink control channel resource A in time domain.
  • the uplink control channel resource does not overlap the uplink control channel resource A means that the uplink control channel resource and the uplink control channel resource A do not overlap at all, or means that the uplink control channel resource and the uplink control channel resource A are not adjacent and have no intersection.
  • the first DCI is latest DCI in pieces of DCI that are received by the terminal device and that point to a time unit in which the uplink control channel resource is located.
  • the first DCI is not earlier than the fourth DCI.
  • the monitoring occasion in which the first DCI is located is later than the monitoring occasion in which the fourth DCI is located.
  • the monitoring occasion in which the first DCI is located is the same as a monitoring occasion in which the fourth DCI is located, and the number of the carrier on which the first DCI is located is greater than a number of a carrier on which the fourth DCI is located.
  • the terminal device receives and decodes DCI received after the first DCI. After decoding the received DCI, if the terminal device finds that feedback information corresponding to the DCI is sent on another uplink control channel resource (for example, the fourth DCI) that overlaps the uplink control channel resource that carries the A-CSI, the terminal device does not decode data scheduled by the DCI, does not send feedback information of the data, or sets the feedback information of the data to a NACK. For example, if a semi-persistent codebook feedback mode is configured by a higher layer, the terminal device sets the feedback information corresponding to the DCI to the NACK. When a dynamic codebook feedback mode is configured by a higher layer, the terminal device does not send the feedback information corresponding to the DCI.
  • another uplink control channel resource for example, the fourth DCI
  • the terminal device does not decode data scheduled by the DCI, does not send feedback information of the data, or sets the feedback information of the data to a NACK. For example, if a semi-persistent code
  • the terminal device finds, after decoding the received DCI, that the uplink control channel resource on which the feedback information corresponding to the DCI is located does not overlap the uplink control channel resource that carries the A-CSI, the terminal device performs an ACK feedback/a NACK feedback according to a normal procedure.
  • the terminal device determines that the uplink information is the feedback information B.
  • the terminal device determines that the uplink information includes the A-CSI, for example, includes the A-CSI and the feedback information A.
  • the terminal device may determine the uplink control channel resource A based on the resource indication information A in the first DCI, send, on the uplink control channel resource A, a codebook E corresponding to the feedback information A and the A-CSI, and send, on the uplink control channel resource B, a codebook F corresponding to the feedback information B.
  • the codebook E does not include the feedback information B
  • the codebook F does not include the feedback information A.
  • the terminal device may determine the uplink control channel resource B based on the resource indication information B in the second DCI, and send, on the uplink control channel resource B, the codebook F corresponding to the feedback information B.
  • the codebook F does not include the feedback information A.
  • the codebook F When the codebook F is a semi-persistent codebook, a bit position that is in the codebook B and that corresponds to the feedback information A may be set to a NACK.
  • the codebook F is a dynamic codebook, the first DCI may be skipped during DAI counting, to save resources.
  • the network device separately indicates the uplink control channel resource for the uplink information that includes the A-CSI, and the terminal device determines that the uplink information is not jointly transmitted with feedback information corresponding to DCI other than the DCI that triggers the A-CSI. Therefore, the network device side does not misunderstand the quantity of bits of the uplink information, so that the uplink information can be correctly received.
  • a CSI request field in the DCI may be enabled to trigger an A-CSI report that is the same as that in the first DCI.
  • the method includes the following steps.
  • the network device sends first DCI to the terminal device, where the first DCI is used to schedule first downlink data and trigger an A-CSI feedback.
  • the first DCI may be specifically used to indicate the terminal device to send an A-CSI report to the network device.
  • the first DCI may include first timing indication information, used to indicate that the A-CSI and feedback information that corresponds to the first downlink data are fed back in a first time unit.
  • the first DCI may further include resource indication information A, used to indicate an uplink control channel resource A.
  • the network device sends second DCI to the terminal device, where the second DCI is used to schedule second downlink data and indicate the terminal device to send the A-CSI report.
  • the second DCI includes second timing indication information, used to indicate that the A-CSI and feedback information corresponding to the second downlink data are fed back in the first time unit.
  • the second DCI may further include resource indication information B, used to indicate an uplink control channel resource B.
  • the second DCI is sent later than the first DCI.
  • the second DCI may be used to indicate the terminal device to jointly send the feedback information of the second downlink data and the A-CSI report.
  • the A-CSI report may be triggered by using a CSI field in the first DCI or the second DCI, and the CSI field may be a CSI request field.
  • any DCI sent by the network device either triggers the A-CSI report, or corresponding feedback information is not fed back in the first time unit.
  • an uplink control channel used for feedback information corresponding to other DCI does not overlap the uplink control channel used for A-CSI.
  • first DCI and the second DCI refer to the related content in the implementation shown in FIG. 4 . Details are not described.
  • the terminal device determines the uplink information to be fed back to the network device.
  • the terminal device attempts to receive the first DCI and the second DCI.
  • the terminal device may ignore the A-CSI report triggered by the second DCI, and specific content of the uplink information may be determined based on DCI latest received by the terminal device. For example, if the second DCI is successfully received, the uplink information is determined based on the second DCI. If the second DCI fails to be received, the uplink information is determined based on the first DCI.
  • the terminal device may determine, based on the first DCI, to send the A-CSI report in the first time unit.
  • the uplink information may include the A-CSI and the feedback information corresponding to the first DCI.
  • the terminal device may determine, based on the first DCI, to send the A-CSI report in the first time unit.
  • the uplink information may include the A-CSI, the feedback information corresponding to the first DCI, and the feedback information corresponding to the second DCI.
  • the terminal device may determine, based on the second DCI, to send the A-CSI report in the first time unit.
  • the uplink information may include the A-CSI and the feedback information corresponding to the second DCI.
  • the terminal device may determine that the uplink information includes feedback information corresponding to third DCI that is received before the first DCI.
  • the third DCI is used to schedule third downlink data, and the third DCI may include third timing indication information, used to indicate that feedback information corresponding to the third downlink data is fed back in the first time unit.
  • the third DCI may further include third resource indication information used to indicate an uplink control channel resource C, and the uplink control channel resource C is different from the uplink control channel resource A or the uplink control channel resource B.
  • a monitoring occasion in which the first DCI is located is later than a monitoring occasion in which the third DCI is located.
  • the terminal device determines an uplink control channel resource that carries the uplink information.
  • the terminal device sends the uplink information to the network device on the uplink control channel resource.
  • the terminal device may determine the uplink control channel resource A based on the resource indication information A, and send, on the uplink control channel resource A, the A-CSI and a codebook G including the feedback information corresponding to the first DCI.
  • the terminal device may determine the uplink control channel resource B based on the resource indication information B, and send, on the uplink control channel resource B, the A-CSI and a codebook H including the feedback information corresponding to the second DCI.
  • the terminal device may determine the uplink control channel resource C based on other received DCI, for example, the third resource indication information in the third DCI, and send, on the uplink control channel resource C, a codebook I including the feedback information corresponding to the third DCI.
  • quantities of bits of the codebook G, the codebook H, and the codebook I are the same.
  • quantities of bits of the codebook G, the codebook H, and the codebook I are different.
  • the terminal device may feed back only the A-CSI on a primary carrier, and all A-CSI reports triggered on other secondary carriers are used as duplications of the A-CSI report triggered on the primary carrier.
  • the uplink control channel resource that carries the uplink information including the A-CSI may be different from or the same as the uplink control channel resource that carries feedback information. This is not limited.
  • the terminal device also receives the DCI used to trigger the A-CSI and schedule the downlink data.
  • the terminal device needs to jointly feed back the A-CSI and the feedback information corresponding to the other DCI, as shown in FIG. 2(a) .
  • FIG. 2(b) A difference between the scenario in FIG. 2(b) and the scenario in FIG.
  • the communication method provided in this embodiment of this application is also applicable to the scenario shown in FIG. 2(b) .
  • the terminal device may determine, by using a group of resource sets, the uplink control channel resource that is used to carry only the feedback information B. If the terminal device successfully receives the DCI that triggers the A-CSI, another group of uplink control channel resource sets is used to determine the uplink control channel resource that carries the feedback information B and the A-CSI.
  • At least one resource set in the two groups of resource sets is different.
  • the feedback information A namely, the feedback information corresponding to DCI that triggers A-CSI
  • the A-CSI are not located on a same uplink control channel resource. Details are not described.
  • other implementations of this application for example, the implementations shown in FIG. 5 to FIG. 7 , may also be applicable to the foregoing separate feedback scenario. A specific implementation is similar to that in the joint feedback scenario. Details are not described.
  • the uplink control channel that carries the A-CSI may overlap the uplink control channel that carries the feedback information (for example, an ACK/a NACK), and may also overlap an uplink data channel.
  • the terminal device may carry (piggyback) the A-CSI on the uplink data channel and transmit the A-CSI in a rate matching (rate-match) manner.
  • the terminal device does not successfully receive the DCI indicating the A-CSI, for example, misses detecting the DCI, the terminal device actually does not transmit the A-CSI on the uplink data channel, but the network device still receives the A-CSI based on a case in which the A-CSI is carried on the uplink data channel. Consequently, the network device incorrectly estimates a resource position of the uplink data, and a data receiving problem occurs.
  • the resource may be a resource element (resource element, RE), and the resource position may be a position of the RE in time domain and frequency domain.
  • FIG. 8 is a schematic flowchart of a communication method according to an embodiment of this application. The method includes the following steps.
  • a terminal device determines an uplink control channel, where the uplink control channel is used to carry first A-CSI.
  • the uplink control channel may be a PUCCH or another control channel used to carry uplink information. This is not limited.
  • the terminal device receives first DCI, where the first DCI is used to indicate the terminal device to send the first A-CSI on the uplink control channel, and the first DCI may be further used to schedule downlink data.
  • first DCI is used to indicate the terminal device to send the first A-CSI on the uplink control channel
  • the first DCI may be further used to schedule downlink data.
  • the terminal device determines an uplink data channel, where the uplink data channel is used to carry uplink data and/or second A-CSI, and the uplink control channel overlaps the uplink data channel in time domain.
  • the uplink data channel may be a physical uplink shared channel (physical uplink shared channel, PUSCH) or a channel used to send the uplink data. This is not limited.
  • the uplink data channel may be dynamic (dynamic) or configured (configured).
  • the dynamic uplink data channel may also be referred to as a dynamically scheduled uplink data channel, for example, may be scheduled by second DCI received by the terminal.
  • the second DCI may be further used to indicate to send the second A-CSI on the uplink data channel.
  • the configured uplink data channel includes different types.
  • the uplink data channel is a PUSCH.
  • the configured PUSCH may be a type 1 (Type 1), namely, a grant-free PUSCH (grant-free PUSCH, GF PUSCH), or a type 2 (Type 2), namely, a semi-persistent scheduling PUSCH (Semi-Persistent Scheduling SPS PUSCH).
  • Type 1 namely, a grant-free PUSCH (grant-free PUSCH, GF PUSCH)
  • Type 2 namely, a semi-persistent scheduling PUSCH (Semi-Persistent Scheduling SPS PUSCH).
  • That the uplink control channel overlaps the uplink data channel in time domain may mean that the first A-CSI and the uplink data and/or the second A-CSI are/is sent in a same time unit.
  • S801 and S802 may be performed before S802.
  • S802 may be performed before S801.
  • S801 and S802 may be simultaneously performed. This is not limited.
  • the terminal device sends information carried on a channel, with a higher priority, in the uplink control channel and the uplink data channel.
  • the priority may be a priority of information carried on a sending channel.
  • the terminal device may mute a channel with a lower priority based on the priorities of the channel, and this includes stopping sending, in an overlapped time unit, information carried on the muted channel, or completely stopping sending information carried on the muted channel.
  • the uplink control channel is the PUCCH and the uplink data channel is the PUSCH is used as an example to list several manners of determining a priority sequence of the uplink control channel and the uplink data channel (refer to the following manner 1 to manner 5). It may be understood that the following several manners are merely examples, and a manner of determining the priority sequence is not limited in this embodiment of this application.
  • the priority sequence is preset and fixed. For example, a priority of the PUCCH is preset to be higher than a priority of the PUSCH. Alternatively, a priority of the PUSCH is preset to be higher than a priority of the PUCCH.
  • the priority sequence is configured by a higher layer.
  • higher layer signaling is used to indicate that the priority of the PUCCH is higher than the priority of the PUSCH.
  • the higher layer signaling is used to indicate that the priority of the PUSCH is higher than the priority of the PUCCH.
  • Manner 3 The priority sequence is determined based on a type of a service of information carried on a channel.
  • a priority of a channel that carries information about a high-priority service is high.
  • a priority of an emergency service such as a URLLC service is higher than a priority of a non-emergency service such as an enhanced mobile broadband (enhanced mobile broadband, eMBB) service.
  • eMBB enhanced mobile broadband
  • the PUSCH carries URLLC service data
  • the priority of the PUSCH is higher than the priority of the PUCCH.
  • the PUCCH carries A-CSI corresponding to the URLLC service
  • the priority of the PUCCH is higher than the priority of the PUSCH.
  • the priority of the PUSCH is higher than the priority of the PUCCH; or if the PUSCH carries the eMBB service data, the priority of the PUCCH is higher than the priority of the PUSCH.
  • the type of the service carried on the PUSCH may be determined in a plurality of manners such as a DCI indication manner or a semi-static configuration manner. This is not limited.
  • a type of a service on the PUSCH may be determined based on a DCI indication.
  • a specific service carried on the PUSCH may be determined based on indication information in DCI that schedules the PUSCH.
  • the indication information may be a radio network temporary identifier (radio network temporary identifier, RNTI) in the DCI or DCI format (format) information, or may be specially set indication information. This is not limited.
  • a type of a service on the PUSCH may be determined in a semi-static configuration manner. Specifically, a specific service carried on the PUSCH is determined based on a modulation and coding scheme table (modulation and coding scheme table, MCS-table) associated with the PUSCH or an SLIV or K1 associated with the PUSCH.
  • the specific service may be a URLLC service or an eMBB service.
  • the type of the service that is carried on the PUCCH and that corresponds to the A-CSI may also be determined in a plurality of manners such as a DCI indication manner or a semi-static configuration manner.
  • a specific service corresponding to the A-CSI may be determined based on the indication information in the DCI that triggers the A-CSI.
  • the indication information may be the RNTI or the DCI format information in the DCI, or may be the specially set indication information.
  • a specific service corresponding to the A-CSI may be determined based on a channel quality indicator table (channel quality indicator table, CQI table) associated with the A-CSI.
  • the specific service may be a URLLC service or an eMBB service.
  • Manner 4 The priority sequence is determined based on a feature of a channel.
  • the feature of the channel includes whether a PUSCH is configured or dynamic, a sequence of scheduling/triggering a PUSCH and a PUCCH, or a sequence of a start symbol of a PUCCH and a start symbol of a PUSCH.
  • the priority of the PUCCH is higher than the priority of the PUSCH.
  • a priority of a channel scheduled/triggered later is higher. For example, if the DCI that triggers the A-CSI is received after the DCI that schedules the PUSCH, the priority of the PUCCH that carries the A-CSI is higher than the priority of the PUSCH. If the DCI that triggers the A-CSI is received before the DCI that schedules the PUSCH, the priority of the PUSCH is higher than the priority of the PUCCH that carries the A-CSI.
  • the terminal device may directly use the PUSCH to carry the A-CSI, or set the priority of the PUCCH that carries the A-CSI to be higher, or configure, by a higher layer, a channel that is preferentially sent.
  • That the DCI that triggers the A-CSI is after the DCI that schedules the PUSCH may mean that a sending moment of a PDCCH corresponding to the PUCCH is later than a sending moment of a PDCCH corresponding to the PUSCH.
  • That the DCI that triggers the A-CSI is before the DCI that schedules the PUSCH may mean that a sending moment of a PDCCH corresponding to the PUCCH is earlier than a sending moment of a PDCCH corresponding to the PUSCH.
  • the terminal device does not expect to receive scheduling DCI of the A-CSI and scheduling DCI of the PUSCH at a same moment.
  • the foregoing sending moment of the PDCCH may be the first time unit or the latest time unit of the PDCCH, for example, may be the first symbol or the latest symbol of the PDCCH.
  • a channel with a start symbol earlier has a higher priority, or a channel with a start symbol later has a higher priority.
  • the terminal device when the uplink data channel overlaps the uplink control channel that carries the A-CSI in time domain, the terminal device sends information carried on the channel with the higher priority, and mutes the channel with the lower priority, so that the uplink data can be correctly received, especially in a scenario in which the terminal device does not successfully receive the DCI indicating that the A-CSI is triggered, and data receiving accuracy can be improved.
  • the terminal device may further separately obtain, from different DCI, indication information that is used to indicate the terminal device to send a same A-CSI report on the uplink control channel and the uplink data channel that overlap in time domain.
  • the A-CSI report may be the A-CSI that is configured by the higher layer and that is carried on the uplink control channel.
  • the method may include: After or when the terminal device receives the DCI (for example, the first DCI) used to indicate the terminal device to send the A-CSI on the uplink control channel (in other words, the first DCI is not received later than the third DCI), the terminal device further receives one or more pieces of third DCI from the network device, where the third DCI is used to schedule the terminal device to send uplink data on an uplink data channel, the third DCI includes indication information, and the indication information is used to indicate the terminal device to send the A-CSI on the uplink data channel.
  • the terminal device may send the uplink data and the A-CSI on the uplink data channel based on the indication information.
  • the A-CSI may also be referred to as an A-CSI report.
  • the first DCI and the third DCI each send an A-CSI request (A-CSI request), where the A-CSI request is used to trigger the terminal device to send the A-CSI report.
  • A-CSI request A-CSI request
  • the first DCI may be further used to schedule downlink data transmission. Details are not described.
  • the indication information may be a preset value in a bit field in the third DCI, and the bit field may be existing or specially set. This is not limited. The following specifically describes several setting manners of the bit field of the indication information by using an example in which the uplink control channel is a PUCCH and the uplink data channel is a PUSCH.
  • the bit field is specially set for triggering the A-CSI report.
  • a bit field may be added to the third DCI.
  • a preset value in the newly added bit field is used to indicate that the network device has scheduled one piece of A-CSI to be sent on the PUCCH, and the PUCCH that carries the A-CSI overlaps the PUSCH. Therefore, a corresponding PUCCH may need to be muted, and the A-CSI is carried on the PUSCH.
  • a corresponding resource position may be reserved on the PUSCH, so that a resource position for data transmission is correct.
  • the bit field may be further used to indicate a quantity of bits of the A-CSI.
  • the A-CSI corresponds to a report identifier (report identity, report ID). Because different A-CSI reports correspond to different sizes of information content, the quantity of bits of the A-CSI may be obtained by using the report identifier.
  • an existing bit field in the third DCI may be reused, a preset value in the existing bit field is used to indicate that the network device has scheduled one piece of A-CSI to be sent on the PUCCH, and the PUCCH that carries the A-CSI overlaps the PUSCH. Therefore, the A-CSI may also be carried on the PUSCH.
  • a CSI-request bit field in the DCI may be reused, the CSI-request bit field is set to a preset value, and the preset value is used to trigger A-CSI corresponding to a same report ID as the A-CSI sent on the PUCCH.
  • the preset value may be associated with an A-CSI report corresponding to the A-CSI.
  • the CSI-request bit field may be 2 bits or 3 bits.
  • information on a channel with a higher priority may be sent based on priorities of the PUSCH and the PUCCH. For example, priorities of types of services of information carried on the two channels may be considered, and a priority of the channel that carries an emergency service is higher.
  • the PUCCH carries the A-CSI corresponding to a URLLC service, and DCI indicating the A-CSI is received after the DCI that schedules the PUSCH. In this case, the A-CSI may be preferentially sent.
  • priorities of types of services of information carried on the two channels may be considered, and a priority of the channel that carries an emergency service is higher.
  • the PUCCH carries the A-CSI corresponding to a URLLC service, and DCI indicating the A-CSI is received after the DCI that schedules the PUSCH.
  • the A-CSI may be preferentially sent.
  • the terminal device may separately receive a plurality of (two or more) A-CSI requests, and the plurality of A-CSI requests are used to separately trigger the terminal device to send, in a time unit, a same A-CSI report on an uplink control channel and an uplink data channel that overlap, thereby improving a success rate of sending the A-CSI by the terminal device, and avoiding an uplink data receiving error.
  • the third DCI when the first DCI is received no later than the third DCI, the third DCI includes the indication information by using the foregoing method, where the indication information is used to indicate the terminal device to send, on the uplink data channel, the A-CSI triggered by the first DCI.
  • the A-CSI may be preferentially sent to mute the uplink data channel.
  • the terminal device may not process the received DCI that indicates that the A-CSI overlaps the uplink data channel. In other words, the terminal device does not expect to receive the A-CSI that is triggered by the DCI and that is sent by overlapping the uplink data channel.
  • the network device may not schedule the A-CSI sent on the uplink control channel to overlap another uplink data channel in time domain.
  • the uplink data channel may be scheduled or configured. This is not limited. Therefore, in this implementation, the terminal device may not send the uplink control channel that carries the A-CSI and that overlaps the uplink data channel in time domain. In other words, the uplink control channel used to send the A-CSI does not overlap the uplink data channel. Therefore, an uplink data receiving error can be avoided.
  • a communication apparatus includes a corresponding hardware structure and/or software module for performing the functions.
  • a person skilled in the art should easily be aware that, in combination with units and algorithm steps of the examples described in the embodiments disclosed in this specification, this application may be implemented by hardware or a combination of hardware and computer software. Whether a function is performed by hardware or hardware driven by computer software depends on particular applications and design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of this application.
  • the communications apparatus may be divided into functional units based on the foregoing method examples.
  • each functional unit may be obtained through division based on a corresponding function, or two or more functions may be integrated into one processing unit.
  • the integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional unit. It should be noted that, division into units in this application is an example, and is merely logical function division. During actual implementation, another division manner may be used.
  • a communications apparatus 900 shown in FIG. 9 includes a processing unit 901 and a transceiver unit 902.
  • the communications apparatus 900 is configured to support a terminal device in implementing the communication method provided in the embodiments of this application.
  • the processing unit 901 may be configured to: determine uplink information; when the uplink information is first feedback information, determine a first uplink control channel resource corresponding to the first feedback information; or when the uplink information includes A-CSI, determine a second uplink control channel resource corresponding to the uplink information, where the first uplink control channel resource is different from the second uplink control channel resource.
  • the transceiver unit 902 may be configured to send the first feedback information on the first uplink control channel resource or send the uplink information on the second uplink control channel resource.
  • the uplink information may include the A-CSI and second feedback information, and the second feedback information and the A-CSI may be indicated by same DCI.
  • the sending unit 902 may be configured to: send the A-CSI on the second uplink control channel resource; or send the A-CSI, the first feedback information, and the second feedback information on the second uplink control channel resource; or send the A-CSI and the first feedback information on the second uplink control channel resource.
  • the transceiver unit 902 is further configured to receive first indication information, where the first indication information is used to indicate a first group of uplink control channel resource sets, and the first group of uplink control channel resource sets includes at least one uplink control channel resource set; and receive second indication information, where the second indication information is used to indicate a second group of uplink control channel resource sets, and the second group of uplink control channel resource sets includes at least one uplink control channel resource set, where at least one uplink control channel resource set in the first group of uplink control channel resource sets is different from at least one uplink control channel resource set in the second group of uplink control channel resource sets.
  • the first uplink control channel resource belongs to a first uplink control channel resource set, and the first uplink control channel resource set belongs to the first group of uplink control channel resource sets; and the second uplink control channel resource belongs to a second uplink control channel resource set, and the second uplink control channel resource set belongs to the second group of uplink control channel resource sets, where the first uplink control channel resource set is different from the second uplink control channel resource set.
  • the first uplink control channel resource belongs to a third uplink control channel resource set, the third uplink control channel resource set belongs to the first group of uplink control channel resource sets, and there is a first mapping relationship between the third uplink control channel resource set and an information payload of the first feedback information; and the second uplink control channel resource belongs to a fourth uplink control channel resource set, the fourth uplink control channel resource set belongs to the first group of uplink control channel resource sets or the second group of uplink control channel resource sets, and there is a second mapping relationship between the fourth uplink control channel resource set and a sum of an information payload of the A-CSI and an information payload of the feedback information (for example, the second feedback information) sent on the second uplink control channel resource, where the first mapping relationship is different from the second mapping relationship.
  • an information payload range corresponding to the fourth uplink control channel resource set is the smallest one of one or more information payload ranges larger than an information payload range corresponding to the third uplink control channel resource set.
  • the processing unit 901 is specifically configured to: determine the first uplink control channel resource based on first resource indication information; and determine the second uplink control channel resource based on second resource indication information, where the first resource indication information and the second resource indication information are included in different DCI.
  • the second resource indication information is included in first DCI, and the first DCI corresponds to the A-CSI; and the first resource indication information is included in second DCI, the second DCI is the N th piece of DCI that is received by the terminal device in a time sequence and that corresponds to the first feedback information, and the first feedback information corresponds to N pieces of DCI (where N is a positive integer).
  • the processing unit 901 may receive third DCI after receiving the first DCI, where the third DCI is used to indicate the terminal device to send third feedback information, and a third uplink control channel resource that carries the third feedback information does not overlap the second uplink control channel resource.
  • the transceiver unit 902 is further configured to receive fourth DCI, where the fourth DCI is received after DCI (for example, the first DCI) that triggers the A-CSI, and the fourth DCI is used to indicate the terminal device to send an A-CSI report corresponding to the A-CSI.
  • the processing unit 901 may be configured to determine, based on the received first DCI and the received fourth DCI, the uplink information and the uplink control channel resource used by the uplink information. For descriptions of the A-CSI report, refer to the related content in the embodiment shown in FIG. 7 . Details are not described.
  • the processing unit 902 is further configured to determine that the second uplink control channel resource is used to carry only the A-CSI or carry the A-CSI and the feedback information corresponding to the DCI that triggers the A-CSI. In other words, the processing unit 902 is configured to determine that the uplink information is not jointly transmitted with feedback information corresponding to DCI other than the DCI that triggers the A-CSI.
  • the processing unit 901 is further configured to determine an uplink data channel, where the uplink data channel is used to carry uplink data and/or second A-CSI, and overlaps, in time domain, the uplink data channel resource and the uplink control channel (for example, the second uplink control channel) that carries the A-CSI.
  • the processing unit 901 is configured to: determine a priority sequence of the uplink data channel and the uplink control channel that carries the A-CSI, and send, through the transceiver unit 902, information carried on a channel with a higher priority. For a manner of determining the priority sequence, refer to the descriptions in the embodiment shown in FIG. 8 . Details are not described.
  • the transceiver unit 902 is further configured to: after or when receiving the DCI used to indicate the terminal device to send the A-CSI on the uplink control channel, receive, from a network device, one or more pieces of DCI used to schedule the terminal device to send the uplink data on the uplink data channel, where the one or more pieces of DCI include indication information, and the indication information is used to indicate the terminal device to send the A-CSI on the uplink data channel.
  • the indication information is used to indicate the terminal device to send the A-CSI on the uplink data channel.
  • the communications apparatus 900 is configured to support a network device in implementing the communication method provided in the embodiments of this application.
  • the processing unit 901 may be configured to: determine an uplink control resource used by uplink information sent by a terminal device; when the uplink information is received on a first uplink control channel resource, determine that the uplink information is first feedback information; or when the uplink information is received on a second uplink control channel resource, determine that the uplink information includes A-CSI, where the first uplink control channel resource is different from the second uplink control channel resource; and receive the uplink information through the transceiver unit 902. It may be understood that when the communications apparatus 900 supports the network device in implementing the communication method provided in this application, functions or operations are the same as or correspond to those on the terminal device side. Details are not described.
  • the transceiver unit 902 is further configured to send first indication information to the terminal device, where the first indication information is used to indicate a first group of uplink control channel resource sets, and the first group of uplink control channel resource sets includes at least one uplink control channel resource set; and send second indication information to the terminal device, where the second indication information is used to indicate a second group of uplink control channel resource sets, and the second group of uplink control channel resource sets includes at least one uplink control channel resource set, where at least one uplink control channel resource set in the first group of uplink control channel resource sets is different from at least one uplink control channel resource set in the second group of uplink control channel resource sets.
  • the transceiver unit 902 is further configured to send first resource indication information to the terminal device, where the first resource indication information is used to determine the first uplink control channel resource; and send second resource indication information to the terminal device, where the second resource indication information is used to determine the second uplink control channel resource, where the first resource indication information and the second resource indication information are included in two pieces of different DCI.
  • the transceiver unit 902 is further configured to: after sending DCI (for example, the first DCI) that triggers the A-CSI, send, to the terminal device, DCI (for example, the fourth DCI) used to indicate the terminal device to send the A-CSI report corresponding to the A-CSI.
  • DCI for example, the first DCI
  • DCI for example, the fourth DCI
  • the transceiver unit 902 is further configured to: after or when sending the DCI that indicates the terminal device to send the A-CSI on the uplink control channel, send one or more pieces of DCI used to schedule the terminal device to send the uplink data on the uplink data channel, where the one or more pieces of DCI include indication information, and the indication information is used to indicate the terminal device to send the A-CSI on the uplink data channel.
  • a processor may perform a function of the processing unit 901, and a transceiver (a transmitter/receiver) may perform a function of the transceiver unit 902.
  • the processing unit 901 may be built in or independent of a processor of a base station in a hardware form, or may be stored in a memory of the base station in a software form, so that the processor invokes and performs an operation corresponding to each of the foregoing modules.
  • FIG. 10 is a schematic structural diagram of a communications apparatus 1000 according to this application.
  • the communications apparatus 1000 may be configured to implement the methods described in the foregoing method embodiments.
  • the communications apparatus 1000 may be a chip, a terminal device, a network device, another wireless communications device, or the like.
  • the communications apparatus 1000 includes one or more processors 1001.
  • the one or more processors 1001 may support the communications apparatus 1000 in implementing the communication method performed by the terminal device in the embodiments of this application, for example, the method performed by the terminal device in the embodiments shown in FIG. 3 to FIG. 8 .
  • the one or more processors 1001 may support the communications apparatus 1000 in implementing the method performed by the network device in the embodiments of this application, for example, the method performed by the network device in the embodiments shown in FIG. 3 to FIG. 8 .
  • the processor 1001 may be a general-purpose processor or a special-purpose processor.
  • the processor 1001 may include a central processing unit (central processing unit, CPU) and/or a baseband processor.
  • the baseband processor may be configured to process communication data (for example, the first message described above), and the CPU may be configured to implement corresponding control and processing functions, execute a software program, and process data of the software program.
  • the communications apparatus 1000 may include a transceiver unit 1005, configured to input (receive) and output (send) a signal.
  • the communications apparatus 1000 may be a chip, and the transceiver unit 1005 may be an input and/or output circuit of the chip.
  • the transceiver unit 1005 may be a communications interface of the chip, and the chip may be used as a component of UE, a base station, or another wireless communications device.
  • the communications apparatus 1000 may be UE or a base station.
  • the transceiver unit 1005 may include a transceiver or a radio frequency chip.
  • the transceiver unit 1005 may further include a communications interface.
  • the communications apparatus 1000 may further include an antenna 1006, and the antenna 1006 may be configured to support the transceiver unit 1005 in implementing a transceiver function of the communications apparatus 1000.
  • the communications apparatus 1000 may include one or more memories 1002.
  • the memory 1002 stores a program (which may also be instructions or code) 1003, and the program 1003 may be run by the processor 1001, so that the processor 1001 performs the methods described in the foregoing method embodiments.
  • the memory 1002 may further store data.
  • the processor 1001 may further read data (for example, predefined information) stored in the memory 1002.
  • the data and the program 1003 may be stored at a same storage address, or the data and the program 1003 may be stored at different storage addresses.
  • the processor 1001 and the memory 1002 may be disposed separately, or may be integrated together, for example, integrated on a board or integrated into a system on chip (system on chip, SOC).
  • SOC system on chip
  • the communications apparatus 1000 is a terminal device or a chip that can be used in the terminal device.
  • the processor 1001 may be configured to: determine uplink information; when the uplink information is first feedback information, determine a first uplink control channel resource corresponding to the first feedback information, and sending the first feedback information on the first uplink control channel resource; or when the uplink information includes A-CSI, determine a second uplink control channel resource corresponding to the uplink information, and send the uplink information on the second uplink control channel resource, where the first uplink control channel resource is different from the second uplink control channel resource.
  • the uplink information may be sent to a network device through the transceiver unit 1005.
  • the communications apparatus 1000 is a network device or a chip that can be used in the network device.
  • the transceiver unit 1005 may be configured to receive uplink information from a terminal device; and the processor 1001 may be configured to: determine an uplink control resource used by the uplink information; and when the uplink information is received on a first uplink control channel resource, determine that the uplink information is first feedback information; or when the uplink information is received on a second uplink control channel resource, determine that the uplink information includes A-CSI, where the first uplink control channel resource is different from the second uplink control channel resource.
  • the processor 1001 may be a CPU, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA), or another programmable logic device, for example, a discrete gate, a transistor logic device, or a discrete hardware component.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • FPGA field programmable gate array
  • This application further provides a computer program product.
  • the computer program product When the computer program product is executed by the processor 1001, the communication method according to any one of the method embodiments of this application is implemented.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or some of the procedures or the functions according to the embodiments of the present invention are generated.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or another programmable apparatus.
  • the computer instructions may be stored in a computer-readable storage medium or may be transmitted from a computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired (for example, a coaxial cable, an optical fiber, or a digital subscriber line (DSL)) or wireless (for example, infrared, radio, or microwave) manner.
  • the computer-readable storage medium may be any usable medium accessible by a computer, or a data storage device, such as a server or a data center, integrating one or more usable media.
  • the computer program product may be stored in the memory 1002.
  • the computer program product is a program 1004.
  • the program 1004 is finally converted into an executable target file that can be executed by the processor 1001.
  • This application further provides a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the computer program When the computer program is executed by a computer, the communication method according to any one of the method embodiments of this application is implemented.
  • the computer program may be a high-level language program, or may be an executable target program.
  • the computer-readable storage medium is, for example, the memory 1002.
  • the memory 1002 may be a volatile memory or a nonvolatile memory, or the memory 1002 may include both a volatile memory and a nonvolatile memory.
  • the nonvolatile memory may be a read-only memory (read-only memory, ROM), a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM), an electrically erasable programmable read-only memory (electrically EPROM, EEPROM), or a flash memory.
  • the volatile memory may be a random access memory (random access memory, RAM), and is used as an external cache.
  • RAMs may be used, for example, a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), a synchronous dynamic random access memory (synchronous DRAM, SDRAM), a double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), an enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), a synchronous link dynamic random access memory (synchlink DRAM, SLDRAM), and a direct rambus random access memory (direct rambus RAM, DR RAM).
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • FIG. 11 is a schematic structural diagram of a terminal device according to this application.
  • the terminal device 1100 may be applicable to the system shown in FIG. 1 , to implement a function of the terminal device in the foregoing method embodiments.
  • FIG. 11 shows only main components of the terminal device.
  • the terminal device 1100 includes a processor, a memory, a control circuit, an antenna, and an input/output apparatus.
  • the processor is mainly configured to: process a communication protocol and communication data, and control the entire terminal device. For example, the processor generates a first message, and then sends the first message through the control circuit and the antenna.
  • the memory is mainly configured to store a program and data, for example, store a communication protocol and the foregoing configuration information.
  • the control circuit is mainly configured to: perform conversion between a baseband signal and a radio frequency signal, and process the radio frequency signal.
  • a combination of the control circuit and the antenna may also be referred to as a transceiver that is mainly configured to receive/send a radio frequency signal in an electromagnetic wave form.
  • the input/output apparatus is, for example, a touchscreen, a display screen, or a keyboard, and is mainly configured to receive data entered by a user and output data to the user.
  • the processor may read a program in the memory, interpret and execute an instruction included in the program, and process data in the program.
  • the processor performs baseband processing on the to-be-sent information, and outputs a baseband signal to a radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal to obtain a radio frequency signal, and sends the radio frequency signal in an electromagnetic wave form through the antenna.
  • an electromagnetic wave namely, the radio frequency signal
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into the baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into the information, and processes the information.
  • FIG. 11 shows only one memory and one processor.
  • the memory may also be referred to as a storage medium, a storage device, or the like. This is not limited in this application.
  • the processor in FIG. 11 may integrate functions of the baseband processor and the CPU.
  • the baseband processor and the CPU may alternatively be respectively independent processors, and are interconnected by using technologies such as a bus.
  • the terminal device may include a plurality of baseband processors to adapt to different network standards, the terminal device may include a plurality of CPUs to improve a processing capability of the terminal device, and the components of the terminal device may be connected by using various buses.
  • the baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip.
  • the CPU may also be referred to as a central processing circuit or a central processing chip.
  • a function of processing the communication protocol and the communication data may be embedded into the processor, or may be stored in the memory in a form of a program, so that the processor executes the program in the memory to implement a baseband processing function.
  • the antenna and the control circuit that have sending and receiving functions may be considered as a transceiver unit 1101 of the terminal device 1100.
  • the transceiver unit 1101 is configured to support the terminal device in implementing the receiving function in the method embodiments, or is configured to support the terminal device in implementing the sending function in the method embodiments.
  • the processor having a processing function is considered as a processing unit 1102 of the terminal device 1100.
  • the terminal device 1100 includes the transceiver unit 1101 and the processing unit 1102.
  • the transceiver unit may also be referred to as a transceiver machine, a transceiver, a transceiver apparatus, or the like.
  • a device configured to implement the receiving function in the transceiver unit 1101 may be considered as a receiving unit.
  • a device configured to implement the sending function in the transceiver unit 1101 may be considered as a sending unit.
  • the transceiver unit 1101 includes the receiving unit and the sending unit.
  • the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, or the like.
  • the sending unit may be referred to as a transmitter, a transmitter machine, a transmitting circuit, or the like.
  • the processor 1102 may be configured to execute a program stored in the memory, to control the transceiver unit 1101 to receive a signal and/or send a signal, to complete a function of the terminal device in the foregoing method embodiments.
  • a function of the transceiver unit 1101 may be implemented through a transceiver circuit or a transceiver-dedicated chip.
  • the processor 1102 may perform a function of the processing unit 901 in the communications apparatus 900 shown in FIG. 9 or a function of the processor 1001 in the communications apparatus 1000 shown in FIG. 10 .
  • the transceiver unit 1101 may perform a function of the transceiver unit 902 in the communications apparatus 900 shown in FIG. 9 or a function of the transceiver unit 1005 in the communications apparatus 1000 shown in FIG. 10 . Details are not described.
  • FIG. 12 is a schematic structural diagram of a network device according to this application.
  • the network device may be, for example, a base station.
  • the base station may be applied to the system shown in FIG. 1 , to implement a function of the network device in the foregoing method embodiments.
  • the base station 1200 may include one or more radio frequency units, for example, a remote radio unit (remote radio unit, RRU) 1201 and at least one baseband unit (baseband unit, BBU) 1202.
  • the BBU 1202 may include a distributed unit (distributed unit, DU), or may include a DU and a central unit (central unit, CU).
  • the RRU 1201 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver machine, and may include at least one antenna 12011 and a radio frequency unit 12012.
  • the RRU 1201 is mainly configured to perform receiving and sending of a radio frequency signal and conversion between a radio frequency signal and a baseband signal, for example, configured to support the base station in implementing a sending function and a receiving function in the method embodiments.
  • the BBU 1202 is mainly configured to perform baseband processing, control the base station, and the like.
  • the RRU 1201 and the BBU 1202 may be physically disposed together, or may be physically separated, namely, a distributed base station.
  • the BBU 1202 may also be referred to as a processing unit, and is mainly configured to complete baseband processing functions such as channel coding, multiplexing, modulation, and spectrum spreading.
  • the BBU 1202 may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiments.
  • the BBU 1202 may include one or more boards.
  • a plurality of boards may jointly support a radio access network (for example, a 5G network) of a single access standard, or may separately support radio access networks (for example, an LTE network and a 5G network) of different access standards.
  • the BBU 1202 further includes a memory 12021 and a processor 12022.
  • the memory 12021 is configured to store necessary instructions and necessary data.
  • the memory 12021 stores various information in the foregoing method embodiments.
  • the processor 12022 is configured to control the base station to perform a necessary action, for example, is configured to control the base station to perform the operation procedure in the foregoing method embodiments.
  • the memory 12021 and the processor 12022 may serve one or more boards. In other words, a memory and a processor may be disposed on each board. Alternatively, a plurality of boards may share a same memory and a same processor. In addition, each board may further be provided with a necessary circuit.
  • the BBU 1202 may perform a function of the processing unit 901 in the communications apparatus 900 shown in FIG. 9 or a function of the processor 1001 in the communications apparatus 1000 shown in FIG. 10 .
  • the RRU 1201 may perform a function of the transceiver unit 902 in the communications apparatus 900 shown in FIG. 9 or a function of the transceiver unit 1005 in the communications apparatus 1000 shown in FIG. 10 . Details are not described.
  • This application further provides a communications system, including the terminal device 1100 and the base station 1200.
  • a communications system including the terminal device 1100 and the base station 1200.
  • the disclosed system, apparatus and method may be implemented in another manner. For example, some features of the method embodiments described above may be ignored or not performed.
  • the described apparatus embodiments are merely examples.
  • the division into units is merely logical function division and may be other division during actual implementation.
  • a plurality of units or components may be combined or integrated into another system.
  • a coupling between the units or a coupling between the components may be a direct coupling, or may be an indirect coupling.
  • the foregoing coupling includes an electrical connection, a mechanical connection, or a connection in another form.
  • sequence indexes of the foregoing processes do not mean execution sequences in the various embodiments of this application.
  • the execution sequences of the processes need to be determined based on functions and internal logic of the processes, and do not need to be construed as any limitation on the implementation processes of the embodiments of this application.
  • the terminal device and/or the network device may perform some or all steps in the embodiments of this application. These steps or operations are merely examples. In the embodiments of this application, other operations or variations of various operations may be further performed. In addition, the steps may be performed in a sequence different from that presented in the embodiments of this application, and not all the operations in the embodiments of this application are necessarily performed.

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US20210337536A1 (en) 2021-10-28

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